/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:58:37,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:58:37,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:58:37,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:58:37,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:58:37,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:58:37,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:58:37,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:58:37,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:58:37,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:58:37,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:58:37,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:58:37,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:58:37,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:58:37,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:58:37,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:58:37,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:58:37,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:58:37,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:58:37,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:58:37,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:58:37,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:58:37,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:58:37,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:58:37,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:58:37,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:58:37,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:58:37,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:58:37,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:58:37,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:58:37,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:58:37,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:58:37,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:58:37,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:58:37,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:58:37,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:58:37,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:58:37,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:58:37,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:58:37,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:58:37,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:58:37,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:58:37,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:58:37,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:58:37,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:58:37,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:58:37,373 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:58:37,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:58:37,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:58:37,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:58:37,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:58:37,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:58:37,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:58:37,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:58:37,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:58:37,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:58:37,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:58:37,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:58:37,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:58:37,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:58:37,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:58:37,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:58:37,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:58:37,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:37,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:58:37,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:58:37,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:58:37,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:58:37,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:58:37,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:58:37,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:58:37,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:58:37,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:58:37,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:58:37,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:58:37,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:58:37,809 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:58:37,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-28 08:58:37,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e01bc8/7ed05b5fdc624aa09108ee93fcbd14c7/FLAG3524203cc [2020-10-28 08:58:38,500 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:58:38,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-28 08:58:38,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e01bc8/7ed05b5fdc624aa09108ee93fcbd14c7/FLAG3524203cc [2020-10-28 08:58:38,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e01bc8/7ed05b5fdc624aa09108ee93fcbd14c7 [2020-10-28 08:58:38,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:58:38,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:58:38,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:38,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:58:38,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:58:38,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:38" (1/1) ... [2020-10-28 08:58:38,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45354182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:38, skipping insertion in model container [2020-10-28 08:58:38,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:38" (1/1) ... [2020-10-28 08:58:38,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:58:38,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:58:39,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:39,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:58:39,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:39,162 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:58:39,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39 WrapperNode [2020-10-28 08:58:39,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:39,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:58:39,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:58:39,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:58:39,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:58:39,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:58:39,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:58:39,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:58:39,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:58:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:58:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:58:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:58:39,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:58:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:58:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:58:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:58:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:58:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:58:39,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:58:39,652 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 08:58:39,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:39 BoogieIcfgContainer [2020-10-28 08:58:39,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:58:39,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:58:39,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:58:39,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:58:39,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:58:38" (1/3) ... [2020-10-28 08:58:39,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff744f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:39, skipping insertion in model container [2020-10-28 08:58:39,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (2/3) ... [2020-10-28 08:58:39,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff744f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:39, skipping insertion in model container [2020-10-28 08:58:39,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:39" (3/3) ... [2020-10-28 08:58:39,690 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2020-10-28 08:58:39,745 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:58:39,764 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:58:39,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:58:39,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:58:39,824 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:58:39,824 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:58:39,824 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:58:39,824 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:58:39,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:58:39,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:58:39,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:58:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 08:58:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:58:39,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:39,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:39,853 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash -925662558, now seen corresponding path program 1 times [2020-10-28 08:58:39,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:39,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127497456] [2020-10-28 08:58:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:40,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:58:40,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:40,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 08:58:40,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:40,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:58:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:40,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:58:40,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:40,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:40,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:40,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 08:58:40,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:40,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:40,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127497456] [2020-10-28 08:58:40,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:40,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:58:40,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63772812] [2020-10-28 08:58:40,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:58:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:58:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:58:40,599 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-28 08:58:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:40,715 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-10-28 08:58:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:58:40,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-28 08:58:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:40,728 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:58:40,728 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:58:40,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:58:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:58:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 08:58:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 08:58:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-28 08:58:40,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2020-10-28 08:58:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:40,777 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-28 08:58:40,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:58:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-28 08:58:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:58:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:40,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:40,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:58:40,779 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash -774064106, now seen corresponding path program 1 times [2020-10-28 08:58:40,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:40,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702262137] [2020-10-28 08:58:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:40,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:58:41,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:58:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-28 08:58:41,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:58:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:58:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:58:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:41,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:41,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:41,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:41,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 08:58:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:41,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702262137] [2020-10-28 08:58:41,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:41,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:58:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049380609] [2020-10-28 08:58:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:58:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:58:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:41,294 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-10-28 08:58:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:41,398 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-28 08:58:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:58:41,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 08:58:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:41,400 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:58:41,400 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:58:41,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:58:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 08:58:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:58:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 08:58:41,413 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-28 08:58:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:41,413 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 08:58:41,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:58:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 08:58:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:58:41,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:41,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:41,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:58:41,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 504393060, now seen corresponding path program 1 times [2020-10-28 08:58:41,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:41,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375643307] [2020-10-28 08:58:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:43,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:58:43,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1657 [2020-10-28 08:58:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:43,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:58:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:58:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:58:43,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:43,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:43,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:43,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:43,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:43,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:58:43,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375643307] [2020-10-28 08:58:43,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:43,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:58:43,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863326453] [2020-10-28 08:58:43,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:58:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:58:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:43,175 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 08:58:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:43,390 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-28 08:58:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:58:43,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 08:58:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:43,392 INFO L225 Difference]: With dead ends: 57 [2020-10-28 08:58:43,393 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:58:43,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:58:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 08:58:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:58:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-28 08:58:43,412 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 24 [2020-10-28 08:58:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:43,413 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-28 08:58:43,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:58:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-28 08:58:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:58:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:43,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:43,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:58:43,416 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1961250610, now seen corresponding path program 2 times [2020-10-28 08:58:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:43,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807878820] [2020-10-28 08:58:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:58:47,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3777 [2020-10-28 08:58:47,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:58:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:58:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:58:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:47,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:47,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:47,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:47,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 08:58:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807878820] [2020-10-28 08:58:47,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:47,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:58:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998104318] [2020-10-28 08:58:47,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:58:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:58:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:47,301 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 6 states. [2020-10-28 08:58:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:47,423 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-28 08:58:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:58:47,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 08:58:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:47,425 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:58:47,425 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:58:47,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:58:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-28 08:58:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:58:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-28 08:58:47,435 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 29 [2020-10-28 08:58:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:47,436 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-28 08:58:47,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:58:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-28 08:58:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:58:47,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:47,437 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:47,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:58:47,438 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash 407436188, now seen corresponding path program 3 times [2020-10-28 08:58:47,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679436260] [2020-10-28 08:58:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:58:52,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:52,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:58:52,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:58:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:58:52,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:58:52,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:52,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:52,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:52,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 08:58:52,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679436260] [2020-10-28 08:58:52,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:52,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:58:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617365907] [2020-10-28 08:58:52,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:58:52,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:58:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:52,576 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 7 states. [2020-10-28 08:58:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:52,767 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-28 08:58:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:58:52,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-28 08:58:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:52,769 INFO L225 Difference]: With dead ends: 75 [2020-10-28 08:58:52,769 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:58:52,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:58:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-28 08:58:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 08:58:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-28 08:58:52,778 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 34 [2020-10-28 08:58:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:52,778 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-28 08:58:52,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:58:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-28 08:58:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:58:52,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:52,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:52,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:58:52,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1192992378, now seen corresponding path program 4 times [2020-10-28 08:58:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:52,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772319962] [2020-10-28 08:58:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:58:57,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:58:57,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:58:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:58:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:58:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:58:57,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:57,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:57,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:57,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:58:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 08:58:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772319962] [2020-10-28 08:58:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:58:57,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933724009] [2020-10-28 08:58:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:58:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:58:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:58:57,929 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 8 states. [2020-10-28 08:58:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:58,128 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-28 08:58:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:58:58,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 08:58:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:58,131 INFO L225 Difference]: With dead ends: 84 [2020-10-28 08:58:58,131 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:58:58,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:58:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:58:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-28 08:58:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 08:58:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-28 08:58:58,146 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2020-10-28 08:58:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:58,147 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-28 08:58:58,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:58:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-28 08:58:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:58:58,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:58,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:58,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:58:58,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1238065620, now seen corresponding path program 5 times [2020-10-28 08:58:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:58,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604453820] [2020-10-28 08:58:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:59,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:03,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:59:03,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:03,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:03,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:03,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:59:03,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:59:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:59:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:03,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:03,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:03,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:03,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:03,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:03,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:59:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604453820] [2020-10-28 08:59:03,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:03,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:59:03,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881559366] [2020-10-28 08:59:03,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:59:03,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:59:03,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:03,298 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 9 states. [2020-10-28 08:59:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:03,472 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-10-28 08:59:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:59:03,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-28 08:59:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:03,474 INFO L225 Difference]: With dead ends: 93 [2020-10-28 08:59:03,474 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:59:03,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:59:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-28 08:59:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:59:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-28 08:59:03,482 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 44 [2020-10-28 08:59:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:03,483 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-28 08:59:03,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:59:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-28 08:59:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:59:03,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:03,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:03,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:59:03,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2060924354, now seen corresponding path program 6 times [2020-10-28 08:59:03,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:03,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599611597] [2020-10-28 08:59:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:05,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:59:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:59:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:08,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:08,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:08,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:08,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:08,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:08,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 08:59:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599611597] [2020-10-28 08:59:08,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:08,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:59:08,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513168940] [2020-10-28 08:59:08,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:59:08,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:59:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:08,722 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-10-28 08:59:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:08,917 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-28 08:59:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:59:08,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 08:59:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:08,919 INFO L225 Difference]: With dead ends: 102 [2020-10-28 08:59:08,920 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:59:08,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:59:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-28 08:59:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 08:59:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-28 08:59:08,928 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2020-10-28 08:59:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:08,928 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-28 08:59:08,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:59:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-28 08:59:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 08:59:08,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:08,930 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:08,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:59:08,930 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash -623140852, now seen corresponding path program 7 times [2020-10-28 08:59:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:08,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600916517] [2020-10-28 08:59:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:09,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:13,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 08:59:13,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:13,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:59:13,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:14,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:14,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:14,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:14,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:14,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:14,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:14,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 08:59:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600916517] [2020-10-28 08:59:14,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:14,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:59:14,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176406261] [2020-10-28 08:59:14,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:59:14,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:14,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:59:14,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:14,107 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 11 states. [2020-10-28 08:59:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:14,308 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-10-28 08:59:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:59:14,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-28 08:59:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:14,309 INFO L225 Difference]: With dead ends: 111 [2020-10-28 08:59:14,309 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:59:14,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:59:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-28 08:59:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:59:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-28 08:59:14,318 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 54 [2020-10-28 08:59:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:14,318 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-28 08:59:14,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:59:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-28 08:59:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:59:14,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:14,320 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:14,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:59:14,320 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1758653174, now seen corresponding path program 8 times [2020-10-28 08:59:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:14,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971702453] [2020-10-28 08:59:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:19,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:59:19,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:59:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:59:19,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:19,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:19,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:19,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:19,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:19,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:59:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971702453] [2020-10-28 08:59:19,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:19,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:59:19,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247557779] [2020-10-28 08:59:19,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:59:19,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:59:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:59:19,554 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 12 states. [2020-10-28 08:59:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:19,859 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-28 08:59:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:59:19,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-28 08:59:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:19,861 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:59:19,861 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:59:19,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:59:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:59:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-28 08:59:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 08:59:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-28 08:59:19,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2020-10-28 08:59:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:19,869 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-28 08:59:19,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:59:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-28 08:59:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:59:19,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:19,871 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:19,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:59:19,871 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash 884848196, now seen corresponding path program 9 times [2020-10-28 08:59:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:19,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306431234] [2020-10-28 08:59:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 08:59:24,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:24,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:59:24,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:59:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 08:59:24,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:59:24,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:25,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:25,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:25,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:25,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:25,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:25,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:25,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:25,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 08:59:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306431234] [2020-10-28 08:59:25,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:25,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:59:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559238455] [2020-10-28 08:59:25,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:59:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:59:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:59:25,130 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 13 states. [2020-10-28 08:59:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:25,384 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-28 08:59:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:59:25,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-28 08:59:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:25,386 INFO L225 Difference]: With dead ends: 129 [2020-10-28 08:59:25,386 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:59:25,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:59:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:59:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-28 08:59:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:59:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-28 08:59:25,395 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 64 [2020-10-28 08:59:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:25,396 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-28 08:59:25,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:59:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-28 08:59:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:59:25,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:25,397 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:25,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:59:25,398 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1808712622, now seen corresponding path program 10 times [2020-10-28 08:59:25,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:25,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430711421] [2020-10-28 08:59:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:59:30,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:30,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:59:30,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:30,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:30,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:30,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-28 08:59:30,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430711421] [2020-10-28 08:59:30,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:30,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:59:30,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403125867] [2020-10-28 08:59:30,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:59:30,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:59:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:59:30,627 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 14 states. [2020-10-28 08:59:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:30,850 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-28 08:59:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:59:30,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-28 08:59:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:30,852 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:59:30,852 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 08:59:30,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:59:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 08:59:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-28 08:59:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:59:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-28 08:59:30,860 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 69 [2020-10-28 08:59:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:30,861 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-28 08:59:30,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:59:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-28 08:59:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 08:59:30,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:30,862 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:30,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:59:30,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1045060484, now seen corresponding path program 11 times [2020-10-28 08:59:30,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:30,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390068888] [2020-10-28 08:59:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:35,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:35,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 08:59:35,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:35,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:59:35,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:35,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:59:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:59:35,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:59:35,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:36,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:36,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-28 08:59:36,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390068888] [2020-10-28 08:59:36,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:59:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74913283] [2020-10-28 08:59:36,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:59:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:59:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:59:36,092 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 15 states. [2020-10-28 08:59:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:36,376 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-10-28 08:59:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:59:36,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-28 08:59:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:36,378 INFO L225 Difference]: With dead ends: 147 [2020-10-28 08:59:36,379 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 08:59:36,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:59:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 08:59:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-10-28 08:59:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:59:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-28 08:59:36,387 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 74 [2020-10-28 08:59:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:36,388 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-28 08:59:36,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:59:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-28 08:59:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:59:36,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:36,389 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:36,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:59:36,389 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1695044710, now seen corresponding path program 12 times [2020-10-28 08:59:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:36,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735663965] [2020-10-28 08:59:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:59:41,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:59:41,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:59:41,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:41,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:41,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-28 08:59:41,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735663965] [2020-10-28 08:59:41,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:41,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:59:41,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933171804] [2020-10-28 08:59:41,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:59:41,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:59:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:59:41,686 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 16 states. [2020-10-28 08:59:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:42,047 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2020-10-28 08:59:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:59:42,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-28 08:59:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:42,050 INFO L225 Difference]: With dead ends: 156 [2020-10-28 08:59:42,050 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 08:59:42,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:59:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 08:59:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-28 08:59:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:59:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-28 08:59:42,059 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 79 [2020-10-28 08:59:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:42,060 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-28 08:59:42,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:59:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-28 08:59:42,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:59:42,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:42,061 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:42,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:59:42,061 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1392022860, now seen corresponding path program 13 times [2020-10-28 08:59:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:42,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978736447] [2020-10-28 08:59:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:42,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:59:47,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 08:59:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:59:47,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:47,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:47,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:47,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:47,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:47,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:47,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-28 08:59:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978736447] [2020-10-28 08:59:47,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:47,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:59:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595371990] [2020-10-28 08:59:47,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:59:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:59:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:47,386 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 17 states. [2020-10-28 08:59:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:47,712 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2020-10-28 08:59:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:59:47,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 84 [2020-10-28 08:59:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:47,714 INFO L225 Difference]: With dead ends: 165 [2020-10-28 08:59:47,715 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 08:59:47,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 08:59:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-28 08:59:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 08:59:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-28 08:59:47,723 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 84 [2020-10-28 08:59:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:47,723 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-28 08:59:47,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:59:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-28 08:59:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:59:47,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:47,725 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:47,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:59:47,725 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 980131102, now seen corresponding path program 14 times [2020-10-28 08:59:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181760655] [2020-10-28 08:59:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:48,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:52,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:59:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:59:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:59:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:53,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:53,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:53,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:53,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:53,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:53,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:53,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:53,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:53,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-28 08:59:53,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181760655] [2020-10-28 08:59:53,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:59:53,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318332602] [2020-10-28 08:59:53,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:59:53,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:59:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:59:53,047 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 18 states. [2020-10-28 08:59:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:53,333 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2020-10-28 08:59:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:59:53,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-28 08:59:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:53,335 INFO L225 Difference]: With dead ends: 174 [2020-10-28 08:59:53,335 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:59:53,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:59:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:59:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-10-28 08:59:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 08:59:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-28 08:59:53,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 89 [2020-10-28 08:59:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:53,344 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-28 08:59:53,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:59:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-28 08:59:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:59:53,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:53,347 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:53,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:59:53,347 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1560868628, now seen corresponding path program 15 times [2020-10-28 08:59:53,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:53,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836430246] [2020-10-28 08:59:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:53,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:59:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:59:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:58,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:59:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 08:59:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:59:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-28 08:59:58,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836430246] [2020-10-28 08:59:58,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:58,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:59:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996020494] [2020-10-28 08:59:58,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:59:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:59:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:59:58,693 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 19 states. [2020-10-28 08:59:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:59,023 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-10-28 08:59:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:59:59,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-28 08:59:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:59,024 INFO L225 Difference]: With dead ends: 183 [2020-10-28 08:59:59,024 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 08:59:59,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:59:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 08:59:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-28 08:59:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:59:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-28 08:59:59,032 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 94 [2020-10-28 08:59:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:59,032 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-28 08:59:59,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:59:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-28 08:59:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:59:59,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:59,033 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:59,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:59:59,033 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 551853526, now seen corresponding path program 16 times [2020-10-28 08:59:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923295074] [2020-10-28 08:59:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:01,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:00:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:04,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:04,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:04,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-28 09:00:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923295074] [2020-10-28 09:00:04,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:04,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:00:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319898666] [2020-10-28 09:00:04,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:00:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:00:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:04,452 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 20 states. [2020-10-28 09:00:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:04,811 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2020-10-28 09:00:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:00:04,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-28 09:00:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:04,813 INFO L225 Difference]: With dead ends: 192 [2020-10-28 09:00:04,813 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 09:00:04,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 09:00:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-28 09:00:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:00:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-28 09:00:04,821 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 99 [2020-10-28 09:00:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:04,822 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-28 09:00:04,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:00:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-28 09:00:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:00:04,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:04,823 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:04,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:00:04,823 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1865908444, now seen corresponding path program 17 times [2020-10-28 09:00:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:04,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773570734] [2020-10-28 09:00:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:04,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:06,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:00:09,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:10,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:10,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-28 09:00:10,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773570734] [2020-10-28 09:00:10,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:10,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:00:10,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200056749] [2020-10-28 09:00:10,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:00:10,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:10,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:00:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:10,187 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 21 states. [2020-10-28 09:00:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:10,581 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2020-10-28 09:00:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:00:10,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-10-28 09:00:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:10,582 INFO L225 Difference]: With dead ends: 201 [2020-10-28 09:00:10,583 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:00:10,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:00:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-28 09:00:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:00:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-28 09:00:10,593 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 104 [2020-10-28 09:00:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:10,593 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-28 09:00:10,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:00:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-28 09:00:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:00:10,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:10,595 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:10,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:00:10,595 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash -597731698, now seen corresponding path program 18 times [2020-10-28 09:00:10,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:10,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399156020] [2020-10-28 09:00:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:10,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:12,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 09:00:15,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:00:15,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:15,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:15,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:15,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:15,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-28 09:00:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399156020] [2020-10-28 09:00:15,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:15,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:00:15,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540819400] [2020-10-28 09:00:15,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:00:15,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:15,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:00:15,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:15,999 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 22 states. [2020-10-28 09:00:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:16,362 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-10-28 09:00:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:00:16,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-10-28 09:00:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:16,364 INFO L225 Difference]: With dead ends: 210 [2020-10-28 09:00:16,364 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 09:00:16,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 09:00:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-28 09:00:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 09:00:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-28 09:00:16,373 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 109 [2020-10-28 09:00:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:16,374 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-28 09:00:16,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:00:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-28 09:00:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 09:00:16,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:16,375 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:16,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:00:16,375 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1690291548, now seen corresponding path program 19 times [2020-10-28 09:00:16,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:16,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587500309] [2020-10-28 09:00:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:18,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:00:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:21,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-28 09:00:21,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587500309] [2020-10-28 09:00:21,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:21,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:00:21,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385177911] [2020-10-28 09:00:21,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:00:21,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:00:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:00:21,815 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 23 states. [2020-10-28 09:00:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:22,228 INFO L93 Difference]: Finished difference Result 219 states and 227 transitions. [2020-10-28 09:00:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:00:22,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-28 09:00:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:22,230 INFO L225 Difference]: With dead ends: 219 [2020-10-28 09:00:22,230 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 09:00:22,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:00:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 09:00:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-28 09:00:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:00:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-28 09:00:22,238 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 114 [2020-10-28 09:00:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:22,238 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-28 09:00:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:00:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-28 09:00:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 09:00:22,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:22,240 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:22,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:00:22,240 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash -3684538, now seen corresponding path program 20 times [2020-10-28 09:00:22,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:22,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112338239] [2020-10-28 09:00:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:22,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:00:27,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:00:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:00:27,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:27,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-28 09:00:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112338239] [2020-10-28 09:00:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:27,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:00:27,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585767532] [2020-10-28 09:00:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:00:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:00:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:27,932 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 24 states. [2020-10-28 09:00:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:28,358 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2020-10-28 09:00:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:00:28,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 119 [2020-10-28 09:00:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:28,363 INFO L225 Difference]: With dead ends: 228 [2020-10-28 09:00:28,364 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 09:00:28,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 09:00:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-28 09:00:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 09:00:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-28 09:00:28,371 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 119 [2020-10-28 09:00:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:28,371 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-28 09:00:28,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:00:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-28 09:00:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 09:00:28,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:28,373 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:28,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:00:28,373 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash -836701292, now seen corresponding path program 21 times [2020-10-28 09:00:28,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:28,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785227460] [2020-10-28 09:00:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:00:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:00:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:00:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:33,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:34,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:34,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:34,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-28 09:00:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785227460] [2020-10-28 09:00:34,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:34,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:00:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611183214] [2020-10-28 09:00:34,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:00:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:00:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:00:34,021 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 25 states. [2020-10-28 09:00:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:34,376 INFO L93 Difference]: Finished difference Result 237 states and 245 transitions. [2020-10-28 09:00:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:00:34,377 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-10-28 09:00:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:34,378 INFO L225 Difference]: With dead ends: 237 [2020-10-28 09:00:34,378 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 09:00:34,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:00:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 09:00:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-28 09:00:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 09:00:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-10-28 09:00:34,386 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 124 [2020-10-28 09:00:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:34,386 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-10-28 09:00:34,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:00:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-10-28 09:00:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 09:00:34,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:34,388 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:34,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:00:34,388 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash 755625982, now seen corresponding path program 22 times [2020-10-28 09:00:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:34,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613996504] [2020-10-28 09:00:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:39,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:39,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 09:00:39,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:00:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:39,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:39,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-28 09:00:39,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613996504] [2020-10-28 09:00:39,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:00:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922489050] [2020-10-28 09:00:39,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:00:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:00:39,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:00:39,926 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 26 states. [2020-10-28 09:00:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:40,291 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2020-10-28 09:00:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:00:40,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-28 09:00:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:40,293 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:00:40,293 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 09:00:40,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:00:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 09:00:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-10-28 09:00:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 09:00:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-28 09:00:40,304 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 129 [2020-10-28 09:00:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:40,304 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-28 09:00:40,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:00:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-28 09:00:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 09:00:40,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:40,306 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:40,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:00:40,308 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -47189556, now seen corresponding path program 23 times [2020-10-28 09:00:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451767877] [2020-10-28 09:00:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:45,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:45,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:00:45,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:45,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:45,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:45,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:45,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:45,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:45,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:45,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-28 09:00:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451767877] [2020-10-28 09:00:45,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:45,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:00:45,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742944062] [2020-10-28 09:00:45,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:00:45,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:45,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:00:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:00:45,870 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 27 states. [2020-10-28 09:00:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:46,325 INFO L93 Difference]: Finished difference Result 255 states and 263 transitions. [2020-10-28 09:00:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:00:46,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2020-10-28 09:00:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:46,327 INFO L225 Difference]: With dead ends: 255 [2020-10-28 09:00:46,327 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 09:00:46,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:00:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 09:00:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-28 09:00:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:00:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2020-10-28 09:00:46,336 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 134 [2020-10-28 09:00:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:46,336 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2020-10-28 09:00:46,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:00:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2020-10-28 09:00:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:00:46,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:46,337 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:46,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:00:46,337 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1427230902, now seen corresponding path program 24 times [2020-10-28 09:00:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10146086] [2020-10-28 09:00:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:51,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:00:51,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:00:51,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 09:00:51,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:51,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:00:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:00:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:00:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:52,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:52,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:52,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:52,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:52,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:00:52,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:52,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:52,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:52,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:52,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:52,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-28 09:00:52,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10146086] [2020-10-28 09:00:52,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:52,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:00:52,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566705972] [2020-10-28 09:00:52,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:00:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:00:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:00:52,040 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand 28 states. [2020-10-28 09:00:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:52,494 INFO L93 Difference]: Finished difference Result 264 states and 272 transitions. [2020-10-28 09:00:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:00:52,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-10-28 09:00:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:52,496 INFO L225 Difference]: With dead ends: 264 [2020-10-28 09:00:52,496 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 09:00:52,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:00:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 09:00:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-28 09:00:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 09:00:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2020-10-28 09:00:52,505 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 139 [2020-10-28 09:00:52,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:52,505 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2020-10-28 09:00:52,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:00:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2020-10-28 09:00:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 09:00:52,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:52,507 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:52,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:00:52,507 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1664141316, now seen corresponding path program 25 times [2020-10-28 09:00:52,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:52,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892924611] [2020-10-28 09:00:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 09:00:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:00:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-28 09:00:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:57,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:00:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:00:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:00:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:58,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:58,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:58,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:58,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:58,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-28 09:00:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892924611] [2020-10-28 09:00:58,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:58,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:00:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739106211] [2020-10-28 09:00:58,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:00:58,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:58,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:00:58,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:00:58,420 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 29 states. [2020-10-28 09:00:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:58,773 INFO L93 Difference]: Finished difference Result 273 states and 281 transitions. [2020-10-28 09:00:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:00:58,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2020-10-28 09:00:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:58,775 INFO L225 Difference]: With dead ends: 273 [2020-10-28 09:00:58,775 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:00:58,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:00:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:00:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-28 09:00:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 09:00:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-28 09:00:58,794 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 144 [2020-10-28 09:00:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:58,795 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-28 09:00:58,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:00:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-28 09:00:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 09:00:58,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:58,796 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:58,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:00:58,797 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:58,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:58,797 INFO L82 PathProgramCache]: Analyzing trace with hash -137664146, now seen corresponding path program 26 times [2020-10-28 09:00:58,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:58,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213593921] [2020-10-28 09:00:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:58,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:03,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:03,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 09:01:03,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:03,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:01:03,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:04,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:04,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:04,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:04,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:04,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:04,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-28 09:01:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213593921] [2020-10-28 09:01:04,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:04,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:01:04,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927450689] [2020-10-28 09:01:04,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:01:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:01:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:04,538 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 30 states. [2020-10-28 09:01:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:05,042 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2020-10-28 09:01:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:01:05,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-10-28 09:01:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:05,044 INFO L225 Difference]: With dead ends: 282 [2020-10-28 09:01:05,045 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 09:01:05,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 09:01:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-10-28 09:01:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 09:01:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2020-10-28 09:01:05,053 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 149 [2020-10-28 09:01:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:05,053 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2020-10-28 09:01:05,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:01:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2020-10-28 09:01:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 09:01:05,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:05,054 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:05,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:01:05,055 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1919383100, now seen corresponding path program 27 times [2020-10-28 09:01:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:05,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053654109] [2020-10-28 09:01:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:05,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:10,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:10,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 09:01:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:01:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:10,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:10,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:10,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:10,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:10,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:10,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:10,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:10,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-28 09:01:10,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053654109] [2020-10-28 09:01:10,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:10,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:01:10,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097170195] [2020-10-28 09:01:10,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:01:10,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:10,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:01:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:10,881 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand 31 states. [2020-10-28 09:01:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:11,352 INFO L93 Difference]: Finished difference Result 291 states and 299 transitions. [2020-10-28 09:01:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:01:11,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2020-10-28 09:01:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:11,353 INFO L225 Difference]: With dead ends: 291 [2020-10-28 09:01:11,353 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 09:01:11,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 09:01:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-28 09:01:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 09:01:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2020-10-28 09:01:11,362 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 154 [2020-10-28 09:01:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:11,362 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2020-10-28 09:01:11,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:01:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2020-10-28 09:01:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 09:01:11,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:11,364 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:11,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:01:11,364 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1679997478, now seen corresponding path program 28 times [2020-10-28 09:01:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:11,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716686291] [2020-10-28 09:01:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:16,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:16,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 09:01:16,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:16,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5236 [2020-10-28 09:01:16,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:16,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:16,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:01:16,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:01:16,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:01:16,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:17,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:17,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:17,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:17,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:17,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:17,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:17,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:17,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-28 09:01:17,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716686291] [2020-10-28 09:01:17,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:17,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:01:17,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88675180] [2020-10-28 09:01:17,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:01:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:01:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:17,354 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand 32 states. [2020-10-28 09:01:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:17,897 INFO L93 Difference]: Finished difference Result 300 states and 308 transitions. [2020-10-28 09:01:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:01:17,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 159 [2020-10-28 09:01:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:17,899 INFO L225 Difference]: With dead ends: 300 [2020-10-28 09:01:17,900 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 09:01:17,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 09:01:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-28 09:01:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 09:01:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2020-10-28 09:01:17,911 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 159 [2020-10-28 09:01:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:17,911 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2020-10-28 09:01:17,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:01:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2020-10-28 09:01:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-28 09:01:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:17,912 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:17,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:01:17,912 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1578630260, now seen corresponding path program 29 times [2020-10-28 09:01:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:17,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479873456] [2020-10-28 09:01:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:18,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:22,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:01:22,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:23,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:23,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:23,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:23,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:23,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-28 09:01:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479873456] [2020-10-28 09:01:23,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:23,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:01:23,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291039351] [2020-10-28 09:01:23,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:01:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:01:23,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:01:23,709 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand 33 states. [2020-10-28 09:01:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:24,318 INFO L93 Difference]: Finished difference Result 309 states and 317 transitions. [2020-10-28 09:01:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:01:24,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 164 [2020-10-28 09:01:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:24,319 INFO L225 Difference]: With dead ends: 309 [2020-10-28 09:01:24,319 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 09:01:24,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:01:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 09:01:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-10-28 09:01:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:01:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2020-10-28 09:01:24,328 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 164 [2020-10-28 09:01:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:24,329 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2020-10-28 09:01:24,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:01:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2020-10-28 09:01:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 09:01:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:24,330 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:24,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:01:24,330 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash -133971234, now seen corresponding path program 30 times [2020-10-28 09:01:24,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:24,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590483546] [2020-10-28 09:01:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:24,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:29,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:29,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 09:01:29,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-28 09:01:29,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:29,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:01:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:01:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:01:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:30,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:30,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:30,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:30,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:30,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-28 09:01:30,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590483546] [2020-10-28 09:01:30,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:30,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:01:30,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379247223] [2020-10-28 09:01:30,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:01:30,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:30,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:01:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:30,343 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand 34 states. [2020-10-28 09:01:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:30,845 INFO L93 Difference]: Finished difference Result 318 states and 326 transitions. [2020-10-28 09:01:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:01:30,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 169 [2020-10-28 09:01:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:30,848 INFO L225 Difference]: With dead ends: 318 [2020-10-28 09:01:30,848 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 09:01:30,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 09:01:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-10-28 09:01:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 09:01:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2020-10-28 09:01:30,857 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 169 [2020-10-28 09:01:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:30,858 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2020-10-28 09:01:30,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:01:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2020-10-28 09:01:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 09:01:30,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:30,859 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:30,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:01:30,859 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash -628729172, now seen corresponding path program 31 times [2020-10-28 09:01:30,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:30,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983055456] [2020-10-28 09:01:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:01:36,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:36,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-28 09:01:36,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983055456] [2020-10-28 09:01:36,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:36,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:01:36,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246022973] [2020-10-28 09:01:36,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:01:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:36,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:01:36,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:01:36,909 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand 35 states. [2020-10-28 09:01:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:37,566 INFO L93 Difference]: Finished difference Result 327 states and 335 transitions. [2020-10-28 09:01:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:01:37,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 174 [2020-10-28 09:01:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:37,568 INFO L225 Difference]: With dead ends: 327 [2020-10-28 09:01:37,568 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:01:37,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:01:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:01:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-28 09:01:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 09:01:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2020-10-28 09:01:37,577 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 174 [2020-10-28 09:01:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:37,578 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2020-10-28 09:01:37,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:01:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2020-10-28 09:01:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 09:01:37,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:37,579 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:37,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:01:37,580 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1616544662, now seen corresponding path program 32 times [2020-10-28 09:01:37,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:37,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501668675] [2020-10-28 09:01:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:37,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6317 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:01:43,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:44,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:44,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:44,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:44,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:44,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:44,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-28 09:01:44,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501668675] [2020-10-28 09:01:44,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:44,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:01:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201307428] [2020-10-28 09:01:44,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:01:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:44,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:01:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:44,878 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand 36 states. [2020-10-28 09:01:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:45,546 INFO L93 Difference]: Finished difference Result 336 states and 344 transitions. [2020-10-28 09:01:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:01:45,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 179 [2020-10-28 09:01:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:45,548 INFO L225 Difference]: With dead ends: 336 [2020-10-28 09:01:45,548 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 09:01:45,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 09:01:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-10-28 09:01:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 09:01:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2020-10-28 09:01:45,558 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 179 [2020-10-28 09:01:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:45,558 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2020-10-28 09:01:45,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:01:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2020-10-28 09:01:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 09:01:45,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:45,560 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:45,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:01:45,560 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -587820828, now seen corresponding path program 33 times [2020-10-28 09:01:45,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:45,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090592518] [2020-10-28 09:01:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:45,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5358 [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:01:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:01:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:01:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:51,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-28 09:01:51,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090592518] [2020-10-28 09:01:51,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:51,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:01:51,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648893387] [2020-10-28 09:01:51,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:01:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:01:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:01:51,970 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand 37 states. [2020-10-28 09:01:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:52,514 INFO L93 Difference]: Finished difference Result 345 states and 353 transitions. [2020-10-28 09:01:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:01:52,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 184 [2020-10-28 09:01:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:52,516 INFO L225 Difference]: With dead ends: 345 [2020-10-28 09:01:52,516 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 09:01:52,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:01:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 09:01:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-10-28 09:01:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 09:01:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 197 transitions. [2020-10-28 09:01:52,525 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 197 transitions. Word has length 184 [2020-10-28 09:01:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:52,526 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 197 transitions. [2020-10-28 09:01:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:01:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 197 transitions. [2020-10-28 09:01:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 09:01:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:52,528 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:52,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:01:52,528 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash -653067186, now seen corresponding path program 34 times [2020-10-28 09:01:52,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:52,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392303545] [2020-10-28 09:01:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:52,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:52,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:58,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:58,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 09:01:58,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5821 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:01:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-28 09:01:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392303545] [2020-10-28 09:01:59,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:59,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:01:59,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229937256] [2020-10-28 09:01:59,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:01:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:01:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:01:59,462 INFO L87 Difference]: Start difference. First operand 194 states and 197 transitions. Second operand 38 states. [2020-10-28 09:02:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:00,001 INFO L93 Difference]: Finished difference Result 354 states and 362 transitions. [2020-10-28 09:02:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:02:00,002 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 189 [2020-10-28 09:02:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:00,003 INFO L225 Difference]: With dead ends: 354 [2020-10-28 09:02:00,004 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 09:02:00,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:02:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 09:02:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-28 09:02:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 09:02:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2020-10-28 09:02:00,012 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 189 [2020-10-28 09:02:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:00,012 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2020-10-28 09:02:00,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:02:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2020-10-28 09:02:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-28 09:02:00,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:00,014 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:00,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:02:00,014 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1538039580, now seen corresponding path program 35 times [2020-10-28 09:02:00,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:00,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446438761] [2020-10-28 09:02:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:00,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:05,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:02:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 09:02:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:02:05,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:06,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:06,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:06,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-28 09:02:06,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446438761] [2020-10-28 09:02:06,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:06,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:02:06,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339668883] [2020-10-28 09:02:06,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:02:06,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:02:06,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:06,218 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand 39 states. [2020-10-28 09:02:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:06,795 INFO L93 Difference]: Finished difference Result 363 states and 371 transitions. [2020-10-28 09:02:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:02:06,796 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 194 [2020-10-28 09:02:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:06,798 INFO L225 Difference]: With dead ends: 363 [2020-10-28 09:02:06,798 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 09:02:06,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 09:02:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-10-28 09:02:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 09:02:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2020-10-28 09:02:06,807 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 194 [2020-10-28 09:02:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2020-10-28 09:02:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:02:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2020-10-28 09:02:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-28 09:02:06,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:06,809 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:06,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:02:06,809 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1830366470, now seen corresponding path program 36 times [2020-10-28 09:02:06,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:06,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879177122] [2020-10-28 09:02:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5317 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:12,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:02:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:02:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:02:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:13,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:13,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:13,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-28 09:02:13,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879177122] [2020-10-28 09:02:13,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:13,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:02:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252396474] [2020-10-28 09:02:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:02:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:02:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:13,331 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand 40 states. [2020-10-28 09:02:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:14,088 INFO L93 Difference]: Finished difference Result 372 states and 380 transitions. [2020-10-28 09:02:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:02:14,089 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 199 [2020-10-28 09:02:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:14,091 INFO L225 Difference]: With dead ends: 372 [2020-10-28 09:02:14,091 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 09:02:14,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 09:02:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-10-28 09:02:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 09:02:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2020-10-28 09:02:14,100 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 199 [2020-10-28 09:02:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:14,100 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2020-10-28 09:02:14,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:02:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2020-10-28 09:02:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-28 09:02:14,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:14,102 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:14,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:02:14,102 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:14,102 INFO L82 PathProgramCache]: Analyzing trace with hash 233604436, now seen corresponding path program 37 times [2020-10-28 09:02:14,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:14,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148230352] [2020-10-28 09:02:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:14,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:19,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:19,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-28 09:02:19,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:19,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5387 [2020-10-28 09:02:19,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:19,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:02:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 09:02:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 09:02:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:20,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:20,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:20,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:20,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:20,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:20,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-28 09:02:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148230352] [2020-10-28 09:02:20,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:20,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:02:20,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69520907] [2020-10-28 09:02:20,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:02:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:02:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:20,747 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand 41 states. [2020-10-28 09:02:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:21,460 INFO L93 Difference]: Finished difference Result 381 states and 389 transitions. [2020-10-28 09:02:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:02:21,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 204 [2020-10-28 09:02:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:21,462 INFO L225 Difference]: With dead ends: 381 [2020-10-28 09:02:21,462 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 09:02:21,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:02:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 09:02:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-28 09:02:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-28 09:02:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 217 transitions. [2020-10-28 09:02:21,472 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 217 transitions. Word has length 204 [2020-10-28 09:02:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:21,472 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 217 transitions. [2020-10-28 09:02:21,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:02:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 217 transitions. [2020-10-28 09:02:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 09:02:21,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:21,474 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:21,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:02:21,474 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 911807934, now seen corresponding path program 38 times [2020-10-28 09:02:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:21,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574785841] [2020-10-28 09:02:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking...