/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:51,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:51,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:51,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:51,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:51,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:51,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:51,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:51,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:51,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:51,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:51,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:51,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:51,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:51,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:51,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:51,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:51,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:51,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:51,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:51,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:51,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:51,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:51,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:51,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:41:51,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:41:51,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:41:51,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:41:51,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:41:51,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:41:51,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:41:51,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:41:51,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:41:51,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:41:51,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:41:51,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:41:51,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:41:51,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:41:51,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:51,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:51,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:51,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:51,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:51,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:51,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:51,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:51,250 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:51,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:51,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:51,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:51,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:51,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:51,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:51,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:51,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:51,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:51,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:51,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:51,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:51,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:51,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:51,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:51,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:51,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:51,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:51,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:51,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:51,256 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:51,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:51,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:51,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:51,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:51,729 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:51,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:41:51,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0657a8577/b71a37b6e3434e2486f82e0e5a66d917/FLAGd8c99a2d9 [2020-12-22 09:41:52,900 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:52,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:41:52,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0657a8577/b71a37b6e3434e2486f82e0e5a66d917/FLAGd8c99a2d9 [2020-12-22 09:41:53,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0657a8577/b71a37b6e3434e2486f82e0e5a66d917 [2020-12-22 09:41:53,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:53,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:53,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:53,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:53,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:53,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:53" (1/1) ... [2020-12-22 09:41:53,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d34f7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:53, skipping insertion in model container [2020-12-22 09:41:53,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:53" (1/1) ... [2020-12-22 09:41:53,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:53,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:53,881 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[8725,8738] [2020-12-22 09:41:53,949 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[16230,16243] [2020-12-22 09:41:55,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:55,091 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:55,162 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[8725,8738] [2020-12-22 09:41:55,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[16230,16243] [2020-12-22 09:41:55,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:55,966 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:55,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55 WrapperNode [2020-12-22 09:41:55,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:55,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:55,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:55,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:55,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:56,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:56,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:56,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:56,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:56,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... [2020-12-22 09:41:57,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:57,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:57,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:57,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:57,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 09:41:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:57,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:42:03,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:42:03,149 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:42:03,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:03 BoogieIcfgContainer [2020-12-22 09:42:03,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:42:03,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:42:03,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:42:03,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:42:03,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:53" (1/3) ... [2020-12-22 09:42:03,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165eab37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:03, skipping insertion in model container [2020-12-22 09:42:03,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:55" (2/3) ... [2020-12-22 09:42:03,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165eab37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:03, skipping insertion in model container [2020-12-22 09:42:03,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:03" (3/3) ... [2020-12-22 09:42:03,162 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:42:03,169 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:42:03,175 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:42:03,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:42:03,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:42:03,232 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:42:03,232 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:42:03,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:42:03,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:42:03,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:42:03,233 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:42:03,233 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:42:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:42:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:03,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:03,278 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:03,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:42:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:03,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281858264] [2020-12-22 09:42:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:03,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281858264] [2020-12-22 09:42:03,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:03,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:42:03,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732172046] [2020-12-22 09:42:03,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:42:03,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:42:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:42:03,541 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:42:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:03,630 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:42:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:42:03,632 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:42:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:03,657 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:42:03,658 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:42:03,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:42:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:42:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:42:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:42:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:42:03,766 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:42:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:03,767 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:42:03,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:42:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:42:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:03,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:03,771 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:03,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:42:03,772 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:42:03,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:03,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016742511] [2020-12-22 09:42:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:03,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016742511] [2020-12-22 09:42:03,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:03,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:03,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513242779] [2020-12-22 09:42:03,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:03,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:03,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:03,989 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:42:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:04,118 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:42:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:04,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:42:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:04,125 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:42:04,126 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:42:04,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:42:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:42:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:42:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:42:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:42:04,160 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:42:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:04,160 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:42:04,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:42:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:04,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:04,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:04,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:42:04,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:42:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:04,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282184020] [2020-12-22 09:42:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282184020] [2020-12-22 09:42:04,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:04,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131454422] [2020-12-22 09:42:04,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:04,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,327 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:42:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:04,379 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:42:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:04,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:42:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:04,393 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:42:04,394 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:42:04,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:42:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:42:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:42:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:42:04,438 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:42:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:04,440 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:42:04,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:42:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:04,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:04,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:04,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:42:04,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:42:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:04,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590886988] [2020-12-22 09:42:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:04,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590886988] [2020-12-22 09:42:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762947197] [2020-12-22 09:42:04,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,543 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:42:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:04,596 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:42:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:04,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:42:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:04,603 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:42:04,603 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:42:04,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:42:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:42:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:42:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:42:04,637 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:42:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:04,638 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:42:04,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:42:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:04,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:04,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:04,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:42:04,646 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:42:04,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:04,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247648541] [2020-12-22 09:42:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:04,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247648541] [2020-12-22 09:42:04,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:04,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435776126] [2020-12-22 09:42:04,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:04,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,788 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:42:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:04,847 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:42:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:04,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:42:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:04,854 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:42:04,855 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:42:04,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:42:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:42:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:42:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:42:04,893 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:42:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:04,893 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:42:04,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:42:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:04,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:42:04,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:42:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:04,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912839165] [2020-12-22 09:42:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:04,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912839165] [2020-12-22 09:42:04,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:04,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:04,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305875773] [2020-12-22 09:42:04,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:04,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:04,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:04,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:04,960 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:42:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:05,015 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:42:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:42:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:05,024 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:42:05,025 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:42:05,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:42:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:42:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:42:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:42:05,071 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:42:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:05,073 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:42:05,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:42:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:05,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:05,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:05,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:42:05,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:42:05,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:05,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520434291] [2020-12-22 09:42:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:05,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520434291] [2020-12-22 09:42:05,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:05,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101240125] [2020-12-22 09:42:05,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:05,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:05,229 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:42:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:05,615 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:42:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:42:05,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:42:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:05,641 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:42:05,642 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:42:05,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:42:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:42:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:42:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:42:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:42:05,777 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:42:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:05,778 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:42:05,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:42:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:05,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:05,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:05,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:42:05,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:42:05,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:05,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331054504] [2020-12-22 09:42:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331054504] [2020-12-22 09:42:05,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:05,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933425007] [2020-12-22 09:42:05,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:05,855 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:42:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:05,962 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:42:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:05,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:05,975 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:42:05,975 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:42:05,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:42:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:42:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:42:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:42:06,102 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2020-12-22 09:42:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:06,104 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2020-12-22 09:42:06,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:42:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:06,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:06,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:06,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:42:06,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:42:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600795886] [2020-12-22 09:42:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:06,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600795886] [2020-12-22 09:42:06,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:06,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:06,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114161243] [2020-12-22 09:42:06,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:06,352 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:42:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:06,642 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:42:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:06,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:42:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:06,656 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:42:06,656 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:42:06,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:42:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:42:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:42:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:42:06,790 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:42:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:06,790 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:42:06,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:42:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:42:06,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:06,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:06,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:42:06,792 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:42:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684687823] [2020-12-22 09:42:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684687823] [2020-12-22 09:42:06,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:06,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:06,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678504958] [2020-12-22 09:42:06,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:06,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:06,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:06,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:06,980 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:42:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:07,201 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:42:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:07,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:42:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:07,214 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:42:07,214 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:42:07,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:42:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:42:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:42:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:42:07,328 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:42:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:07,328 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:42:07,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:42:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:42:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:07,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:07,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:42:07,330 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:07,331 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:42:07,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:07,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027057140] [2020-12-22 09:42:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:07,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027057140] [2020-12-22 09:42:07,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:07,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:07,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051526319] [2020-12-22 09:42:07,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:07,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:07,433 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:42:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:07,665 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:42:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:07,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:42:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:07,678 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:42:07,678 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:42:07,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:42:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:42:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:42:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:42:07,796 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:42:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:07,796 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:42:07,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:42:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:42:07,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:07,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:07,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:42:07,798 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:07,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:42:07,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:07,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598231452] [2020-12-22 09:42:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598231452] [2020-12-22 09:42:07,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:07,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584401968] [2020-12-22 09:42:07,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:07,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:07,889 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:42:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:08,159 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:42:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:42:08,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:42:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:08,181 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:42:08,181 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:42:08,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:42:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:42:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:42:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:42:08,383 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:42:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:08,384 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:42:08,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:42:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:42:08,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:08,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:08,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:42:08,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1457269204, now seen corresponding path program 1 times [2020-12-22 09:42:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:08,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632337413] [2020-12-22 09:42:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632337413] [2020-12-22 09:42:08,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:08,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:08,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682241470] [2020-12-22 09:42:08,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:42:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:42:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:42:08,524 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:42:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:19,686 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:42:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:42:19,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:42:19,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:19,712 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:42:19,713 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:42:19,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:42:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:42:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:42:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5673 transitions. [2020-12-22 09:42:19,948 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5673 transitions. Word has length 67 [2020-12-22 09:42:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:19,949 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5673 transitions. [2020-12-22 09:42:19,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:42:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5673 transitions. [2020-12-22 09:42:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:42:19,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:19,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:19,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:42:19,953 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:42:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:19,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349931440] [2020-12-22 09:42:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:42:20,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349931440] [2020-12-22 09:42:20,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:20,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869484108] [2020-12-22 09:42:20,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:20,077 INFO L87 Difference]: Start difference. First operand 3785 states and 5673 transitions. Second operand 6 states. [2020-12-22 09:42:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:20,708 INFO L93 Difference]: Finished difference Result 10091 states and 14442 transitions. [2020-12-22 09:42:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:20,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:42:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:20,747 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:42:20,747 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:42:20,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:42:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:42:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:42:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7737 transitions. [2020-12-22 09:42:21,101 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7737 transitions. Word has length 79 [2020-12-22 09:42:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:21,101 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7737 transitions. [2020-12-22 09:42:21,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7737 transitions. [2020-12-22 09:42:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:42:21,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:21,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:21,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:42:21,104 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:42:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:21,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101367347] [2020-12-22 09:42:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:42:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101367347] [2020-12-22 09:42:21,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:21,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:21,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163129815] [2020-12-22 09:42:21,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:21,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:21,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:21,261 INFO L87 Difference]: Start difference. First operand 5281 states and 7737 transitions. Second operand 6 states. [2020-12-22 09:42:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:21,963 INFO L93 Difference]: Finished difference Result 11587 states and 16506 transitions. [2020-12-22 09:42:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:21,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:42:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:21,991 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:42:21,991 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:42:21,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:42:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:42:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:42:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10813 transitions. [2020-12-22 09:42:22,505 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10813 transitions. Word has length 79 [2020-12-22 09:42:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:22,505 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10813 transitions. [2020-12-22 09:42:22,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10813 transitions. [2020-12-22 09:42:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:42:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:22,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:22,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:42:22,509 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:42:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:22,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706147757] [2020-12-22 09:42:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:42:22,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706147757] [2020-12-22 09:42:22,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:22,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990805059] [2020-12-22 09:42:22,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:22,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:22,603 INFO L87 Difference]: Start difference. First operand 7529 states and 10813 transitions. Second operand 6 states. [2020-12-22 09:42:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:23,515 INFO L93 Difference]: Finished difference Result 13083 states and 18570 transitions. [2020-12-22 09:42:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:23,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:42:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:23,541 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:42:23,541 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:42:23,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:42:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:42:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:42:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12877 transitions. [2020-12-22 09:42:24,113 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12877 transitions. Word has length 79 [2020-12-22 09:42:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:24,113 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12877 transitions. [2020-12-22 09:42:24,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12877 transitions. [2020-12-22 09:42:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:42:24,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:24,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:24,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:42:24,117 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:42:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:24,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413260811] [2020-12-22 09:42:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:42:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413260811] [2020-12-22 09:42:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495200076] [2020-12-22 09:42:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:24,208 INFO L87 Difference]: Start difference. First operand 9025 states and 12877 transitions. Second operand 6 states. [2020-12-22 09:42:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:24,967 INFO L93 Difference]: Finished difference Result 13699 states and 19434 transitions. [2020-12-22 09:42:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:24,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:42:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:24,997 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:42:24,997 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:42:25,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:42:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:42:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:42:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14349 transitions. [2020-12-22 09:42:25,775 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14349 transitions. Word has length 79 [2020-12-22 09:42:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:25,775 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14349 transitions. [2020-12-22 09:42:25,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14349 transitions. [2020-12-22 09:42:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:42:25,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:25,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:25,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:42:25,779 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:42:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547170500] [2020-12-22 09:42:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:26,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547170500] [2020-12-22 09:42:26,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571207983] [2020-12-22 09:42:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:26,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:26,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:26,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:42:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49287469] [2020-12-22 09:42:26,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:42:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:42:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:42:26,854 INFO L87 Difference]: Start difference. First operand 10081 states and 14349 transitions. Second operand 18 states. [2020-12-22 09:42:26,995 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:27,283 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:42:27,552 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:29,101 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:29,467 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:30,612 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:42:30,882 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:42:31,287 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:42:32,917 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:33,942 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:42:34,349 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:34,499 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:36,750 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:37,352 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:37,526 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:37,999 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:38,407 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:42:38,654 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:38,830 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:42:39,341 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:42:39,642 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:42:40,936 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:41,553 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:41,686 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:42,003 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:46,192 INFO L93 Difference]: Finished difference Result 79147 states and 108322 transitions. [2020-12-22 09:42:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:42:46,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:42:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:46,373 INFO L225 Difference]: With dead ends: 79147 [2020-12-22 09:42:46,374 INFO L226 Difference]: Without dead ends: 71353 [2020-12-22 09:42:46,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:42:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71353 states. [2020-12-22 09:42:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71353 to 35561. [2020-12-22 09:42:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35561 states. [2020-12-22 09:42:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35561 states to 35561 states and 49291 transitions. [2020-12-22 09:42:50,090 INFO L78 Accepts]: Start accepts. Automaton has 35561 states and 49291 transitions. Word has length 80 [2020-12-22 09:42:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:50,090 INFO L481 AbstractCegarLoop]: Abstraction has 35561 states and 49291 transitions. [2020-12-22 09:42:50,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:42:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 35561 states and 49291 transitions. [2020-12-22 09:42:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:50,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:50,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:50,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:42:50,311 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:42:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:50,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886095929] [2020-12-22 09:42:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:50,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886095929] [2020-12-22 09:42:50,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:50,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:50,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829632232] [2020-12-22 09:42:50,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:50,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:50,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:50,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:50,388 INFO L87 Difference]: Start difference. First operand 35561 states and 49291 transitions. Second operand 3 states. [2020-12-22 09:42:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:53,261 INFO L93 Difference]: Finished difference Result 68837 states and 94999 transitions. [2020-12-22 09:42:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:53,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:53,331 INFO L225 Difference]: With dead ends: 68837 [2020-12-22 09:42:53,332 INFO L226 Difference]: Without dead ends: 35563 [2020-12-22 09:42:53,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35563 states. [2020-12-22 09:42:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35563 to 34601. [2020-12-22 09:42:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34601 states. [2020-12-22 09:42:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34601 states to 34601 states and 47287 transitions. [2020-12-22 09:42:56,424 INFO L78 Accepts]: Start accepts. Automaton has 34601 states and 47287 transitions. Word has length 81 [2020-12-22 09:42:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:56,424 INFO L481 AbstractCegarLoop]: Abstraction has 34601 states and 47287 transitions. [2020-12-22 09:42:56,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 34601 states and 47287 transitions. [2020-12-22 09:42:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:56,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:56,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:56,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:56,429 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:42:56,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:56,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857078142] [2020-12-22 09:42:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:56,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857078142] [2020-12-22 09:42:56,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746231521] [2020-12-22 09:42:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:56,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:57,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:57,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:42:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114820899] [2020-12-22 09:42:57,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:42:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:42:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:42:57,411 INFO L87 Difference]: Start difference. First operand 34601 states and 47287 transitions. Second operand 18 states. [2020-12-22 09:42:57,577 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:57,831 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:42:57,977 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:42:58,129 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:58,640 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:42:59,794 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:59,995 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-22 09:43:00,122 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:43:04,481 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:04,765 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:04,901 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:05,306 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:43:05,912 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:43:06,146 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:43:06,484 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:43:06,853 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:07,368 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:07,755 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:07,948 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:43:08,451 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:43:10,334 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:10,784 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:43:15,466 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:15,973 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:16,145 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:43:16,738 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:43:17,037 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:43:18,043 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:26,987 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:27,612 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:31,966 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:32,629 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:38,424 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:38,955 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:43:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:44,642 INFO L93 Difference]: Finished difference Result 360828 states and 480117 transitions. [2020-12-22 09:43:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:43:44,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-22 09:43:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:45,590 INFO L225 Difference]: With dead ends: 360828 [2020-12-22 09:43:45,590 INFO L226 Difference]: Without dead ends: 328514 [2020-12-22 09:43:45,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2700, Invalid=15390, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 09:43:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328514 states. [2020-12-22 09:44:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328514 to 161412. [2020-12-22 09:44:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161412 states. [2020-12-22 09:44:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161412 states to 161412 states and 217153 transitions. [2020-12-22 09:44:04,693 INFO L78 Accepts]: Start accepts. Automaton has 161412 states and 217153 transitions. Word has length 81 [2020-12-22 09:44:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:04,693 INFO L481 AbstractCegarLoop]: Abstraction has 161412 states and 217153 transitions. [2020-12-22 09:44:04,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:44:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 161412 states and 217153 transitions. [2020-12-22 09:44:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:44:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:04,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:04,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:04,913 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:44:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:04,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318900898] [2020-12-22 09:44:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:04,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318900898] [2020-12-22 09:44:04,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:04,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327380284] [2020-12-22 09:44:04,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:04,976 INFO L87 Difference]: Start difference. First operand 161412 states and 217153 transitions. Second operand 3 states. [2020-12-22 09:44:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:14,554 INFO L93 Difference]: Finished difference Result 249776 states and 335369 transitions. [2020-12-22 09:44:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:14,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:44:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:14,723 INFO L225 Difference]: With dead ends: 249776 [2020-12-22 09:44:14,723 INFO L226 Difference]: Without dead ends: 90651 [2020-12-22 09:44:14,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90651 states. [2020-12-22 09:44:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90651 to 90649. [2020-12-22 09:44:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90649 states. [2020-12-22 09:44:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90649 states to 90649 states and 120175 transitions. [2020-12-22 09:44:23,909 INFO L78 Accepts]: Start accepts. Automaton has 90649 states and 120175 transitions. Word has length 81 [2020-12-22 09:44:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:23,909 INFO L481 AbstractCegarLoop]: Abstraction has 90649 states and 120175 transitions. [2020-12-22 09:44:23,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 90649 states and 120175 transitions. [2020-12-22 09:44:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:44:23,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:23,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:23,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:44:23,914 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:44:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:23,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361563665] [2020-12-22 09:44:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361563665] [2020-12-22 09:44:24,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:24,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:24,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401237233] [2020-12-22 09:44:24,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:24,150 INFO L87 Difference]: Start difference. First operand 90649 states and 120175 transitions. Second operand 3 states. [2020-12-22 09:44:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:27,224 INFO L93 Difference]: Finished difference Result 115746 states and 153823 transitions. [2020-12-22 09:44:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:27,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:44:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:27,260 INFO L225 Difference]: With dead ends: 115746 [2020-12-22 09:44:27,261 INFO L226 Difference]: Without dead ends: 27384 [2020-12-22 09:44:27,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27384 states. [2020-12-22 09:44:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27384 to 27382. [2020-12-22 09:44:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27382 states. [2020-12-22 09:44:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27382 states to 27382 states and 36771 transitions. [2020-12-22 09:44:29,895 INFO L78 Accepts]: Start accepts. Automaton has 27382 states and 36771 transitions. Word has length 81 [2020-12-22 09:44:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:29,895 INFO L481 AbstractCegarLoop]: Abstraction has 27382 states and 36771 transitions. [2020-12-22 09:44:29,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 27382 states and 36771 transitions. [2020-12-22 09:44:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:44:29,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:29,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:29,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:44:29,900 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:44:29,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:29,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104863538] [2020-12-22 09:44:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:44:29,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104863538] [2020-12-22 09:44:29,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:29,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269891530] [2020-12-22 09:44:29,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:29,983 INFO L87 Difference]: Start difference. First operand 27382 states and 36771 transitions. Second operand 6 states. [2020-12-22 09:44:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:31,593 INFO L93 Difference]: Finished difference Result 41424 states and 55317 transitions. [2020-12-22 09:44:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:31,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:44:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:31,614 INFO L225 Difference]: With dead ends: 41424 [2020-12-22 09:44:31,614 INFO L226 Difference]: Without dead ends: 16388 [2020-12-22 09:44:31,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2020-12-22 09:44:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 16388. [2020-12-22 09:44:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16388 states. [2020-12-22 09:44:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16388 states to 16388 states and 21966 transitions. [2020-12-22 09:44:33,267 INFO L78 Accepts]: Start accepts. Automaton has 16388 states and 21966 transitions. Word has length 81 [2020-12-22 09:44:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:33,267 INFO L481 AbstractCegarLoop]: Abstraction has 16388 states and 21966 transitions. [2020-12-22 09:44:33,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 16388 states and 21966 transitions. [2020-12-22 09:44:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:44:33,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:33,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:33,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:44:33,273 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:44:33,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:33,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111017169] [2020-12-22 09:44:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:44:33,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111017169] [2020-12-22 09:44:33,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:33,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:33,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261774542] [2020-12-22 09:44:33,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:33,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:33,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:33,352 INFO L87 Difference]: Start difference. First operand 16388 states and 21966 transitions. Second operand 6 states. [2020-12-22 09:44:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:36,395 INFO L93 Difference]: Finished difference Result 40760 states and 54022 transitions. [2020-12-22 09:44:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:36,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:44:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:36,432 INFO L225 Difference]: With dead ends: 40760 [2020-12-22 09:44:36,432 INFO L226 Difference]: Without dead ends: 26691 [2020-12-22 09:44:36,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26691 states. [2020-12-22 09:44:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26691 to 23873. [2020-12-22 09:44:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23873 states. [2020-12-22 09:44:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23873 states to 23873 states and 31643 transitions. [2020-12-22 09:44:38,806 INFO L78 Accepts]: Start accepts. Automaton has 23873 states and 31643 transitions. Word has length 81 [2020-12-22 09:44:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:38,806 INFO L481 AbstractCegarLoop]: Abstraction has 23873 states and 31643 transitions. [2020-12-22 09:44:38,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23873 states and 31643 transitions. [2020-12-22 09:44:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:44:38,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:38,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:38,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:44:38,810 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:44:38,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:38,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015852274] [2020-12-22 09:44:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015852274] [2020-12-22 09:44:38,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:38,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967859077] [2020-12-22 09:44:38,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:38,889 INFO L87 Difference]: Start difference. First operand 23873 states and 31643 transitions. Second operand 3 states. [2020-12-22 09:44:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:40,102 INFO L93 Difference]: Finished difference Result 34677 states and 45587 transitions. [2020-12-22 09:44:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:40,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:44:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:40,121 INFO L225 Difference]: With dead ends: 34677 [2020-12-22 09:44:40,121 INFO L226 Difference]: Without dead ends: 13127 [2020-12-22 09:44:40,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-12-22 09:44:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 13125. [2020-12-22 09:44:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13125 states. [2020-12-22 09:44:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 17365 transitions. [2020-12-22 09:44:41,351 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 17365 transitions. Word has length 82 [2020-12-22 09:44:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:41,351 INFO L481 AbstractCegarLoop]: Abstraction has 13125 states and 17365 transitions. [2020-12-22 09:44:41,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 17365 transitions. [2020-12-22 09:44:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:41,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:41,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:41,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:44:41,354 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:44:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:41,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197309202] [2020-12-22 09:44:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197309202] [2020-12-22 09:44:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189999816] [2020-12-22 09:44:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 09:44:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:43,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 09:44:43,898 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 413 [2020-12-22 09:44:55,177 WARN L197 SmtUtils]: Spent 10.37 s on a formula simplification. DAG size of input: 413 DAG size of output: 104 [2020-12-22 09:44:56,006 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-22 09:44:57,312 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:58,795 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:45:01,895 WARN L197 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-12-22 09:45:01,979 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:45:07,175 WARN L197 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 294 DAG size of output: 113 [2020-12-22 09:45:07,414 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:45:13,995 WARN L197 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 274 DAG size of output: 113 [2020-12-22 09:45:14,027 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:45:14,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:14,114 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 3 disjuncts [2020-12-22 09:45:14,118 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 09:45:14,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:45:14,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 09:45:14,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432084068] [2020-12-22 09:45:14,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:45:14,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:45:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:45:14,121 INFO L87 Difference]: Start difference. First operand 13125 states and 17365 transitions. Second operand 13 states. [2020-12-22 09:45:14,989 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-12-22 09:45:15,217 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:45:15,462 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:45:15,926 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:45:16,231 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 09:45:16,852 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:45:17,144 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:45:17,472 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:45:17,740 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:45:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,354 INFO L93 Difference]: Finished difference Result 22249 states and 28792 transitions. [2020-12-22 09:45:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:45:19,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-12-22 09:45:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,372 INFO L225 Difference]: With dead ends: 22249 [2020-12-22 09:45:19,372 INFO L226 Difference]: Without dead ends: 18089 [2020-12-22 09:45:19,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 09:45:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2020-12-22 09:45:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 12599. [2020-12-22 09:45:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12599 states. [2020-12-22 09:45:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 16645 transitions. [2020-12-22 09:45:20,485 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 16645 transitions. Word has length 83 [2020-12-22 09:45:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:20,485 INFO L481 AbstractCegarLoop]: Abstraction has 12599 states and 16645 transitions. [2020-12-22 09:45:20,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:45:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 16645 transitions. [2020-12-22 09:45:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:45:20,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:20,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:20,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:45:20,702 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:45:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:20,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535907292] [2020-12-22 09:45:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:21,141 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:21,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535907292] [2020-12-22 09:45:21,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558134992] [2020-12-22 09:45:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:45:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:22,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:22,379 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:45:23,203 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:45:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:23,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:23,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:45:23,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027546611] [2020-12-22 09:45:23,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:45:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:45:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:45:23,289 INFO L87 Difference]: Start difference. First operand 12599 states and 16645 transitions. Second operand 24 states. [2020-12-22 09:45:24,065 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-12-22 09:45:24,385 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-12-22 09:45:24,795 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:45:25,237 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:45:25,566 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:45:26,211 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 09:45:26,814 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:45:27,201 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 09:45:28,141 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-22 09:45:28,698 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:45:29,409 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-12-22 09:45:30,138 WARN L197 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-22 09:45:30,511 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:45:31,025 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:45:31,585 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:45:32,384 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:45:34,410 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:45:35,369 WARN L197 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-12-22 09:45:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,314 INFO L93 Difference]: Finished difference Result 37514 states and 47317 transitions. [2020-12-22 09:45:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 09:45:37,315 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2020-12-22 09:45:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,348 INFO L225 Difference]: With dead ends: 37514 [2020-12-22 09:45:37,349 INFO L226 Difference]: Without dead ends: 33335 [2020-12-22 09:45:37,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 09:45:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33335 states. [2020-12-22 09:45:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33335 to 18779. [2020-12-22 09:45:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18779 states. [2020-12-22 09:45:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 24297 transitions. [2020-12-22 09:45:39,509 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 24297 transitions. Word has length 83 [2020-12-22 09:45:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:39,509 INFO L481 AbstractCegarLoop]: Abstraction has 18779 states and 24297 transitions. [2020-12-22 09:45:39,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:45:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 24297 transitions. [2020-12-22 09:45:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:45:39,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:39,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:39,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:39,715 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1008179547, now seen corresponding path program 1 times [2020-12-22 09:45:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201248920] [2020-12-22 09:45:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:40,457 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:40,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201248920] [2020-12-22 09:45:40,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234632467] [2020-12-22 09:45:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:45:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates...