/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.5.ufo.BOUNDED-10.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:05,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:05,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:05,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:05,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:05,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:05,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:05,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:05,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:05,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:05,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:05,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:05,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:05,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:05,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:05,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:05,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:05,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:05,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:05,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:05,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:05,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:05,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:05,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:05,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:05,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:56:05,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:56:05,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:56:05,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:56:05,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:56:05,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:56:05,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:56:05,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:56:05,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:05,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:05,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:05,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:05,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:05,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:05,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:05,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:05,301 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:05,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:05,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:05,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:05,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:05,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:05,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:05,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:05,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:05,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:05,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:05,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:05,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:05,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:05,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:05,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:05,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:05,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:05,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:05,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:05,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:05,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:05,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:05,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:05,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:05,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:05,802 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:05,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:56:05,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f787e39/958cff49e3e0465da5693a1036862e96/FLAGc13547756 [2020-12-22 09:56:06,919 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:06,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:56:06,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f787e39/958cff49e3e0465da5693a1036862e96/FLAGc13547756 [2020-12-22 09:56:07,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f787e39/958cff49e3e0465da5693a1036862e96 [2020-12-22 09:56:07,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:07,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:07,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:07,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:07,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:07,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:07" (1/1) ... [2020-12-22 09:56:07,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d262fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:07, skipping insertion in model container [2020-12-22 09:56:07,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:07" (1/1) ... [2020-12-22 09:56:07,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:07,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:07,939 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.5.ufo.BOUNDED-10.pals+Problem12_label09.c[11730,11743] [2020-12-22 09:56:08,043 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.5.ufo.BOUNDED-10.pals+Problem12_label09.c[19235,19248] [2020-12-22 09:56:09,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:09,116 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:09,193 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.5.ufo.BOUNDED-10.pals+Problem12_label09.c[11730,11743] [2020-12-22 09:56:09,213 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.5.ufo.BOUNDED-10.pals+Problem12_label09.c[19235,19248] [2020-12-22 09:56:09,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:09,913 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:09,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09 WrapperNode [2020-12-22 09:56:09,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:09,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:09,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:09,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:09,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:10,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:56:10,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:56:10,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:56:10,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:10,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:11,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (1/1) ... [2020-12-22 09:56:11,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:56:11,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:56:11,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:56:11,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:56:11,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (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 09:56:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:56:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:56:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:56:11,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:56:17,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:56:17,075 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:56:17,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:17 BoogieIcfgContainer [2020-12-22 09:56:17,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:56:17,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:56:17,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:56:17,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:56:17,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:07" (1/3) ... [2020-12-22 09:56:17,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269dab4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:17, skipping insertion in model container [2020-12-22 09:56:17,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:09" (2/3) ... [2020-12-22 09:56:17,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269dab4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:17, skipping insertion in model container [2020-12-22 09:56:17,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:17" (3/3) ... [2020-12-22 09:56:17,090 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:56:17,097 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:56:17,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:56:17,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:56:17,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:56:17,159 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:56:17,160 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:56:17,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:56:17,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:56:17,160 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:56:17,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:56:17,160 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:56:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:56:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:17,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:17,206 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] [2020-12-22 09:56:17,206 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:56:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:17,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220389215] [2020-12-22 09:56:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:17,462 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 09:56:17,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220389215] [2020-12-22 09:56:17,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:17,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789763469] [2020-12-22 09:56:17,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:56:17,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:17,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:56:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:56:17,491 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:56:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:17,585 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:56:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:56:17,588 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:56:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:17,645 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:56:17,645 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:56:17,659 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 09:56:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:56:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:56:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:56:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:56:17,791 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:56:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:17,791 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:56:17,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:56:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:56:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:17,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:17,800 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] [2020-12-22 09:56:17,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:56:17,801 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:56:17,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:17,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601449389] [2020-12-22 09:56:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:18,006 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 09:56:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601449389] [2020-12-22 09:56:18,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:18,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382966224] [2020-12-22 09:56:18,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:18,012 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:56:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:18,270 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:56:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:56:18,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:56:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:18,278 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:56:18,278 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:56:18,280 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 09:56:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:56:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:56:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:56:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:56:18,303 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:56:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:18,303 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:56:18,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:56:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:18,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:18,310 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] [2020-12-22 09:56:18,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:56:18,311 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:56:18,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:18,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975740870] [2020-12-22 09:56:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:18,449 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 09:56:18,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975740870] [2020-12-22 09:56:18,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:18,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:18,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034788114] [2020-12-22 09:56:18,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:18,452 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 3 states. [2020-12-22 09:56:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:18,496 INFO L93 Difference]: Finished difference Result 941 states and 1712 transitions. [2020-12-22 09:56:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:18,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:18,508 INFO L225 Difference]: With dead ends: 941 [2020-12-22 09:56:18,509 INFO L226 Difference]: Without dead ends: 889 [2020-12-22 09:56:18,511 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 09:56:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-12-22 09:56:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 887. [2020-12-22 09:56:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-12-22 09:56:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1628 transitions. [2020-12-22 09:56:18,550 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1628 transitions. Word has length 64 [2020-12-22 09:56:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:18,550 INFO L481 AbstractCegarLoop]: Abstraction has 887 states and 1628 transitions. [2020-12-22 09:56:18,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1628 transitions. [2020-12-22 09:56:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:18,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:18,552 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] [2020-12-22 09:56:18,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:56:18,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:56:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:18,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788355102] [2020-12-22 09:56:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:18,695 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 09:56:18,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788355102] [2020-12-22 09:56:18,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:18,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817857405] [2020-12-22 09:56:18,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:18,698 INFO L87 Difference]: Start difference. First operand 887 states and 1628 transitions. Second operand 3 states. [2020-12-22 09:56:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:18,744 INFO L93 Difference]: Finished difference Result 1067 states and 1912 transitions. [2020-12-22 09:56:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:18,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:18,751 INFO L225 Difference]: With dead ends: 1067 [2020-12-22 09:56:18,751 INFO L226 Difference]: Without dead ends: 971 [2020-12-22 09:56:18,752 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 09:56:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-12-22 09:56:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2020-12-22 09:56:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2020-12-22 09:56:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1757 transitions. [2020-12-22 09:56:18,789 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1757 transitions. Word has length 64 [2020-12-22 09:56:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:18,789 INFO L481 AbstractCegarLoop]: Abstraction has 969 states and 1757 transitions. [2020-12-22 09:56:18,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1757 transitions. [2020-12-22 09:56:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:18,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:18,791 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] [2020-12-22 09:56:18,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:56:18,791 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:18,792 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:56:18,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:18,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26297677] [2020-12-22 09:56:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:18,859 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 09:56:18,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26297677] [2020-12-22 09:56:18,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:18,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:18,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954883580] [2020-12-22 09:56:18,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:18,862 INFO L87 Difference]: Start difference. First operand 969 states and 1757 transitions. Second operand 3 states. [2020-12-22 09:56:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:18,907 INFO L93 Difference]: Finished difference Result 1301 states and 2279 transitions. [2020-12-22 09:56:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:18,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:18,914 INFO L225 Difference]: With dead ends: 1301 [2020-12-22 09:56:18,915 INFO L226 Difference]: Without dead ends: 1123 [2020-12-22 09:56:18,916 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 09:56:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2020-12-22 09:56:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1121. [2020-12-22 09:56:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1121 states. [2020-12-22 09:56:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1993 transitions. [2020-12-22 09:56:18,951 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1993 transitions. Word has length 64 [2020-12-22 09:56:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:18,952 INFO L481 AbstractCegarLoop]: Abstraction has 1121 states and 1993 transitions. [2020-12-22 09:56:18,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1993 transitions. [2020-12-22 09:56:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:18,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:18,953 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] [2020-12-22 09:56:18,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:56:18,953 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:56:18,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:18,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635250135] [2020-12-22 09:56:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:19,018 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 09:56:19,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635250135] [2020-12-22 09:56:19,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:19,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021680998] [2020-12-22 09:56:19,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:19,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:19,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:19,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:19,020 INFO L87 Difference]: Start difference. First operand 1121 states and 1993 transitions. Second operand 3 states. [2020-12-22 09:56:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:19,074 INFO L93 Difference]: Finished difference Result 1733 states and 2947 transitions. [2020-12-22 09:56:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:19,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:19,083 INFO L225 Difference]: With dead ends: 1733 [2020-12-22 09:56:19,083 INFO L226 Difference]: Without dead ends: 1403 [2020-12-22 09:56:19,084 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 09:56:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-12-22 09:56:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2020-12-22 09:56:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1401 states. [2020-12-22 09:56:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 2421 transitions. [2020-12-22 09:56:19,129 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 2421 transitions. Word has length 64 [2020-12-22 09:56:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:19,129 INFO L481 AbstractCegarLoop]: Abstraction has 1401 states and 2421 transitions. [2020-12-22 09:56:19,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 2421 transitions. [2020-12-22 09:56:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:19,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:19,131 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] [2020-12-22 09:56:19,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:56:19,131 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:56:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:19,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622730973] [2020-12-22 09:56:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:19,189 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 09:56:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622730973] [2020-12-22 09:56:19,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523557004] [2020-12-22 09:56:19,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:19,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:19,192 INFO L87 Difference]: Start difference. First operand 1401 states and 2421 transitions. Second operand 3 states. [2020-12-22 09:56:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:19,261 INFO L93 Difference]: Finished difference Result 2525 states and 4151 transitions. [2020-12-22 09:56:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:19,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:19,272 INFO L225 Difference]: With dead ends: 2525 [2020-12-22 09:56:19,272 INFO L226 Difference]: Without dead ends: 1915 [2020-12-22 09:56:19,274 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 09:56:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-12-22 09:56:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1913. [2020-12-22 09:56:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1913 states. [2020-12-22 09:56:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3189 transitions. [2020-12-22 09:56:19,346 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3189 transitions. Word has length 64 [2020-12-22 09:56:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:19,346 INFO L481 AbstractCegarLoop]: Abstraction has 1913 states and 3189 transitions. [2020-12-22 09:56:19,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3189 transitions. [2020-12-22 09:56:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:19,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:19,347 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] [2020-12-22 09:56:19,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:56:19,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:56:19,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:19,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985258001] [2020-12-22 09:56:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:19,581 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 09:56:19,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985258001] [2020-12-22 09:56:19,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:19,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:19,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802803402] [2020-12-22 09:56:19,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:19,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:19,584 INFO L87 Difference]: Start difference. First operand 1913 states and 3189 transitions. Second operand 7 states. [2020-12-22 09:56:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:20,246 INFO L93 Difference]: Finished difference Result 13133 states and 20319 transitions. [2020-12-22 09:56:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:56:20,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:56:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:20,314 INFO L225 Difference]: With dead ends: 13133 [2020-12-22 09:56:20,315 INFO L226 Difference]: Without dead ends: 12011 [2020-12-22 09:56:20,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:56:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12011 states. [2020-12-22 09:56:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12011 to 3033. [2020-12-22 09:56:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3033 states. [2020-12-22 09:56:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 4837 transitions. [2020-12-22 09:56:20,616 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 4837 transitions. Word has length 64 [2020-12-22 09:56:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:20,618 INFO L481 AbstractCegarLoop]: Abstraction has 3033 states and 4837 transitions. [2020-12-22 09:56:20,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 4837 transitions. [2020-12-22 09:56:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:20,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:20,619 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] [2020-12-22 09:56:20,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:56:20,620 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:56:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:20,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945050064] [2020-12-22 09:56:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:20,719 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 09:56:20,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945050064] [2020-12-22 09:56:20,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:20,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764188303] [2020-12-22 09:56:20,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:20,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:20,722 INFO L87 Difference]: Start difference. First operand 3033 states and 4837 transitions. Second operand 3 states. [2020-12-22 09:56:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:20,978 INFO L93 Difference]: Finished difference Result 6319 states and 9753 transitions. [2020-12-22 09:56:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:20,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:21,019 INFO L225 Difference]: With dead ends: 6319 [2020-12-22 09:56:21,019 INFO L226 Difference]: Without dead ends: 4077 [2020-12-22 09:56:21,024 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 09:56:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2020-12-22 09:56:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 4075. [2020-12-22 09:56:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:56:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6343 transitions. [2020-12-22 09:56:21,281 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6343 transitions. Word has length 66 [2020-12-22 09:56:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:21,287 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6343 transitions. [2020-12-22 09:56:21,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6343 transitions. [2020-12-22 09:56:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:21,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:21,296 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] [2020-12-22 09:56:21,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:56:21,297 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:56:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140391122] [2020-12-22 09:56:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:21,570 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 09:56:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140391122] [2020-12-22 09:56:21,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:21,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850024658] [2020-12-22 09:56:21,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:21,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:21,576 INFO L87 Difference]: Start difference. First operand 4075 states and 6343 transitions. Second operand 7 states. [2020-12-22 09:56:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:22,052 INFO L93 Difference]: Finished difference Result 7359 states and 11209 transitions. [2020-12-22 09:56:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:22,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:56:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:22,063 INFO L225 Difference]: With dead ends: 7359 [2020-12-22 09:56:22,063 INFO L226 Difference]: Without dead ends: 4077 [2020-12-22 09:56:22,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:56:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2020-12-22 09:56:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 4075. [2020-12-22 09:56:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:56:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6295 transitions. [2020-12-22 09:56:22,318 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6295 transitions. Word has length 66 [2020-12-22 09:56:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:22,319 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6295 transitions. [2020-12-22 09:56:22,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6295 transitions. [2020-12-22 09:56:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:22,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:22,320 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 09:56:22,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:56:22,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:56:22,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:22,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270255678] [2020-12-22 09:56:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:22,454 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 09:56:22,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270255678] [2020-12-22 09:56:22,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:22,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140572352] [2020-12-22 09:56:22,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:56:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:56:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:56:22,459 INFO L87 Difference]: Start difference. First operand 4075 states and 6295 transitions. Second operand 6 states. [2020-12-22 09:56:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:22,803 INFO L93 Difference]: Finished difference Result 7357 states and 11112 transitions. [2020-12-22 09:56:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:56:22,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:56:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:22,814 INFO L225 Difference]: With dead ends: 7357 [2020-12-22 09:56:22,814 INFO L226 Difference]: Without dead ends: 4075 [2020-12-22 09:56:22,819 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 09:56:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-12-22 09:56:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4075. [2020-12-22 09:56:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:56:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6247 transitions. [2020-12-22 09:56:23,033 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6247 transitions. Word has length 67 [2020-12-22 09:56:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:23,033 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6247 transitions. [2020-12-22 09:56:23,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:56:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6247 transitions. [2020-12-22 09:56:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:23,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:23,034 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 09:56:23,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:56:23,035 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:56:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044104314] [2020-12-22 09:56:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:23,123 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 09:56:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044104314] [2020-12-22 09:56:23,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:23,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:23,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241544523] [2020-12-22 09:56:23,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:56:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:23,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:56:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:56:23,125 INFO L87 Difference]: Start difference. First operand 4075 states and 6247 transitions. Second operand 6 states. [2020-12-22 09:56:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:23,545 INFO L93 Difference]: Finished difference Result 7357 states and 11016 transitions. [2020-12-22 09:56:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:56:23,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:56:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:23,555 INFO L225 Difference]: With dead ends: 7357 [2020-12-22 09:56:23,556 INFO L226 Difference]: Without dead ends: 4075 [2020-12-22 09:56:23,562 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 09:56:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-12-22 09:56:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4075. [2020-12-22 09:56:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:56:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6199 transitions. [2020-12-22 09:56:23,782 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6199 transitions. Word has length 67 [2020-12-22 09:56:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:23,782 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6199 transitions. [2020-12-22 09:56:23,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:56:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6199 transitions. [2020-12-22 09:56:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:23,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:23,784 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 09:56:23,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:56:23,784 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:56:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:23,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725102235] [2020-12-22 09:56:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:23,873 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 09:56:23,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725102235] [2020-12-22 09:56:23,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:23,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:23,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883945940] [2020-12-22 09:56:23,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:23,881 INFO L87 Difference]: Start difference. First operand 4075 states and 6199 transitions. Second operand 5 states. [2020-12-22 09:56:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:24,360 INFO L93 Difference]: Finished difference Result 6918 states and 10173 transitions. [2020-12-22 09:56:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:24,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:56:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:24,377 INFO L225 Difference]: With dead ends: 6918 [2020-12-22 09:56:24,378 INFO L226 Difference]: Without dead ends: 6916 [2020-12-22 09:56:24,381 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 09:56:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2020-12-22 09:56:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 4267. [2020-12-22 09:56:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4267 states. [2020-12-22 09:56:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6375 transitions. [2020-12-22 09:56:24,686 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6375 transitions. Word has length 67 [2020-12-22 09:56:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:24,686 INFO L481 AbstractCegarLoop]: Abstraction has 4267 states and 6375 transitions. [2020-12-22 09:56:24,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6375 transitions. [2020-12-22 09:56:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:24,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:24,688 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 09:56:24,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:56:24,688 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2064290429, now seen corresponding path program 1 times [2020-12-22 09:56:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:24,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717783803] [2020-12-22 09:56:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:24,754 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 09:56:24,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717783803] [2020-12-22 09:56:24,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:24,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:24,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257270670] [2020-12-22 09:56:24,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:24,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:24,757 INFO L87 Difference]: Start difference. First operand 4267 states and 6375 transitions. Second operand 3 states. [2020-12-22 09:56:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:30,928 INFO L93 Difference]: Finished difference Result 5771 states and 9248 transitions. [2020-12-22 09:56:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:30,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:56:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:30,951 INFO L225 Difference]: With dead ends: 5771 [2020-12-22 09:56:30,951 INFO L226 Difference]: Without dead ends: 5018 [2020-12-22 09:56:30,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:56:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2020-12-22 09:56:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2020-12-22 09:56:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:56:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7354 transitions. [2020-12-22 09:56:31,247 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7354 transitions. Word has length 67 [2020-12-22 09:56:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:31,248 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7354 transitions. [2020-12-22 09:56:31,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7354 transitions. [2020-12-22 09:56:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:31,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:31,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:31,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:56:31,252 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:56:31,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:31,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090487073] [2020-12-22 09:56:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:56:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090487073] [2020-12-22 09:56:31,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:31,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:31,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240210416] [2020-12-22 09:56:31,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:31,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:31,389 INFO L87 Difference]: Start difference. First operand 5018 states and 7354 transitions. Second operand 7 states. [2020-12-22 09:56:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:33,194 INFO L93 Difference]: Finished difference Result 23094 states and 32784 transitions. [2020-12-22 09:56:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:33,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:33,240 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:56:33,240 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:56:33,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:56:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:56:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:56:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12202 transitions. [2020-12-22 09:56:33,939 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12202 transitions. Word has length 95 [2020-12-22 09:56:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:33,939 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12202 transitions. [2020-12-22 09:56:33,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12202 transitions. [2020-12-22 09:56:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:33,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:33,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:33,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:56:33,944 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:56:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:33,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568487067] [2020-12-22 09:56:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:56:34,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568487067] [2020-12-22 09:56:34,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:34,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137814053] [2020-12-22 09:56:34,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:34,068 INFO L87 Difference]: Start difference. First operand 8490 states and 12202 transitions. Second operand 7 states. [2020-12-22 09:56:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:35,341 INFO L93 Difference]: Finished difference Result 26566 states and 37632 transitions. [2020-12-22 09:56:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:35,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:35,393 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:56:35,393 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:56:35,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:56:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:56:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:56:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19434 transitions. [2020-12-22 09:56:36,660 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19434 transitions. Word has length 95 [2020-12-22 09:56:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:36,660 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19434 transitions. [2020-12-22 09:56:36,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19434 transitions. [2020-12-22 09:56:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:36,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:56:36,666 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:56:36,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826293080] [2020-12-22 09:56:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:56:36,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826293080] [2020-12-22 09:56:36,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:36,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7778520] [2020-12-22 09:56:36,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:36,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:36,803 INFO L87 Difference]: Start difference. First operand 13706 states and 19434 transitions. Second operand 7 states. [2020-12-22 09:56:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:38,816 INFO L93 Difference]: Finished difference Result 30038 states and 42480 transitions. [2020-12-22 09:56:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:38,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:38,877 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:56:38,878 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:56:38,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:56:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:56:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:56:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24282 transitions. [2020-12-22 09:56:39,997 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24282 transitions. Word has length 95 [2020-12-22 09:56:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:39,997 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24282 transitions. [2020-12-22 09:56:39,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24282 transitions. [2020-12-22 09:56:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:40,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:40,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:40,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:56:40,004 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:56:40,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:40,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953192710] [2020-12-22 09:56:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:56:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953192710] [2020-12-22 09:56:40,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:40,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746288404] [2020-12-22 09:56:40,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:40,120 INFO L87 Difference]: Start difference. First operand 17178 states and 24282 transitions. Second operand 7 states. [2020-12-22 09:56:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:41,808 INFO L93 Difference]: Finished difference Result 33510 states and 47328 transitions. [2020-12-22 09:56:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:41,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:41,851 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:56:41,852 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:56:41,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:56:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:56:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:56:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29130 transitions. [2020-12-22 09:56:43,035 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29130 transitions. Word has length 95 [2020-12-22 09:56:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:43,035 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29130 transitions. [2020-12-22 09:56:43,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29130 transitions. [2020-12-22 09:56:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:43,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:43,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:43,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:56:43,042 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:56:43,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:43,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295973444] [2020-12-22 09:56:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295973444] [2020-12-22 09:56:43,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:43,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676335946] [2020-12-22 09:56:43,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:43,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:43,175 INFO L87 Difference]: Start difference. First operand 20650 states and 29130 transitions. Second operand 7 states. [2020-12-22 09:56:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:45,094 INFO L93 Difference]: Finished difference Result 34902 states and 49296 transitions. [2020-12-22 09:56:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:45,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:45,143 INFO L225 Difference]: With dead ends: 34902 [2020-12-22 09:56:45,143 INFO L226 Difference]: Without dead ends: 32468 [2020-12-22 09:56:45,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2020-12-22 09:56:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2020-12-22 09:56:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23082 states. [2020-12-22 09:56:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32554 transitions. [2020-12-22 09:56:46,962 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32554 transitions. Word has length 95 [2020-12-22 09:56:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:46,962 INFO L481 AbstractCegarLoop]: Abstraction has 23082 states and 32554 transitions. [2020-12-22 09:56:46,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32554 transitions. [2020-12-22 09:56:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:56:46,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:46,969 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:46,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:56:46,969 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:56:46,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:46,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486468101] [2020-12-22 09:56:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:47,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486468101] [2020-12-22 09:56:47,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731995906] [2020-12-22 09:56:47,322 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 09:56:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:56:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:47,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:47,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:56:47,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287328648] [2020-12-22 09:56:47,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:56:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:56:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:56:47,789 INFO L87 Difference]: Start difference. First operand 23082 states and 32554 transitions. Second operand 21 states. [2020-12-22 09:57:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:02,395 INFO L93 Difference]: Finished difference Result 139883 states and 194035 transitions. [2020-12-22 09:57:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:57:02,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:57:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:02,648 INFO L225 Difference]: With dead ends: 139883 [2020-12-22 09:57:02,648 INFO L226 Difference]: Without dead ends: 118345 [2020-12-22 09:57:02,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:57:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118345 states. [2020-12-22 09:57:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118345 to 73762. [2020-12-22 09:57:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73762 states. [2020-12-22 09:57:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73762 states to 73762 states and 101962 transitions. [2020-12-22 09:57:09,194 INFO L78 Accepts]: Start accepts. Automaton has 73762 states and 101962 transitions. Word has length 96 [2020-12-22 09:57:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:09,195 INFO L481 AbstractCegarLoop]: Abstraction has 73762 states and 101962 transitions. [2020-12-22 09:57:09,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:57:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 73762 states and 101962 transitions. [2020-12-22 09:57:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:09,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:09,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:09,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:57:09,420 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:57:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:09,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963993497] [2020-12-22 09:57:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963993497] [2020-12-22 09:57:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094227222] [2020-12-22 09:57:09,734 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 09:57:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:09,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:10,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:10,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:10,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:10,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973749861] [2020-12-22 09:57:10,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:10,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:10,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:10,506 INFO L87 Difference]: Start difference. First operand 73762 states and 101962 transitions. Second operand 17 states. [2020-12-22 09:57:10,862 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:57:11,460 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:14,503 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:57:14,667 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:14,881 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:15,125 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:57:15,379 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:16,086 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:57:16,440 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:16,726 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:17,050 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:57:17,798 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:18,135 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:19,178 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:32,167 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-22 09:58:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:39,022 INFO L93 Difference]: Finished difference Result 949968 states and 1294037 transitions. [2020-12-22 09:58:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:58:39,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:58:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:40,953 INFO L225 Difference]: With dead ends: 949968 [2020-12-22 09:58:40,953 INFO L226 Difference]: Without dead ends: 877750 [2020-12-22 09:58:41,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:58:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877750 states. [2020-12-22 09:59:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877750 to 336518. [2020-12-22 09:59:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336518 states. [2020-12-22 09:59:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336518 states to 336518 states and 459026 transitions. [2020-12-22 09:59:20,314 INFO L78 Accepts]: Start accepts. Automaton has 336518 states and 459026 transitions. Word has length 97 [2020-12-22 09:59:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:20,314 INFO L481 AbstractCegarLoop]: Abstraction has 336518 states and 459026 transitions. [2020-12-22 09:59:20,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:59:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 336518 states and 459026 transitions. [2020-12-22 09:59:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:20,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:20,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:20,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:20,547 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:59:20,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:20,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880876945] [2020-12-22 09:59:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:20,620 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 09:59:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880876945] [2020-12-22 09:59:20,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:20,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602003609] [2020-12-22 09:59:20,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:20,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:20,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:20,622 INFO L87 Difference]: Start difference. First operand 336518 states and 459026 transitions. Second operand 3 states.