/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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:35:37,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:35:37,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:35:38,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:35:38,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:35:38,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:35:38,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:35:38,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:35:38,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:35:38,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:35:38,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:35:38,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:35:38,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:35:38,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:35:38,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:35:38,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:35:38,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:35:38,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:35:38,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:35:38,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:35:38,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:35:38,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:35:38,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:35:38,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:35:38,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:35:38,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:35:38,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:35:38,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:35:38,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:35:38,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:35:38,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:35:38,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:35:38,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:35:38,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:35:38,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:35:38,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:35:38,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:35:38,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:35:38,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:35:38,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:35:38,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:35:38,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:35:38,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:35:38,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:35:38,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:35:38,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:35:38,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:35:38,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:35:38,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:35:38,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:35:38,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:35:38,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:35:38,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:35:38,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:35:38,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:35:38,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:35:38,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:35:38,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:35:38,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:35:38,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:35:38,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:35:38,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:35:38,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:35:38,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:35:38,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:35:38,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:35:38,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:35:38,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:35:38,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:35:38,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:35:38,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:35:38,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:35:38,581 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:35:38,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:35:38,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0567596c/aca03eb1012143d08c10ecd6cefc894e/FLAGb4ccee236 [2020-12-22 07:35:39,247 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:35:39,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:35:39,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0567596c/aca03eb1012143d08c10ecd6cefc894e/FLAGb4ccee236 [2020-12-22 07:35:39,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0567596c/aca03eb1012143d08c10ecd6cefc894e [2020-12-22 07:35:39,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:35:39,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:35:39,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:39,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:35:39,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:35:39,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:39" (1/1) ... [2020-12-22 07:35:39,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5deea787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:39, skipping insertion in model container [2020-12-22 07:35:39,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:39" (1/1) ... [2020-12-22 07:35:39,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:35:39,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:35:40,018 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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2020-12-22 07:35:40,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:40,033 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:35:40,095 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/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2020-12-22 07:35:40,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:40,119 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:35:40,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40 WrapperNode [2020-12-22 07:35:40,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:40,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:40,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:35:40,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:35:40,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:40,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:35:40,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:35:40,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:35:40,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (1/1) ... [2020-12-22 07:35:40,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:35:40,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:35:40,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:35:40,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:35:40,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (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 07:35:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:35:40,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:35:40,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:35:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:35:41,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:35:41,175 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:35:41,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:41 BoogieIcfgContainer [2020-12-22 07:35:41,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:35:41,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:35:41,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:35:41,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:35:41,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:35:39" (1/3) ... [2020-12-22 07:35:41,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26930dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:41, skipping insertion in model container [2020-12-22 07:35:41,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:40" (2/3) ... [2020-12-22 07:35:41,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26930dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:41, skipping insertion in model container [2020-12-22 07:35:41,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:41" (3/3) ... [2020-12-22 07:35:41,193 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:35:41,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:35:41,204 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:35:41,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:35:41,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:35:41,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:35:41,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:35:41,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:35:41,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:35:41,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:35:41,265 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:35:41,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:35:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states. [2020-12-22 07:35:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:41,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:41,293 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] [2020-12-22 07:35:41,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2020-12-22 07:35:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:41,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53659959] [2020-12-22 07:35:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:41,552 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 07:35:41,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53659959] [2020-12-22 07:35:41,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:41,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:35:41,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439659457] [2020-12-22 07:35:41,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:35:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:41,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:35:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:35:41,580 INFO L87 Difference]: Start difference. First operand 111 states. Second operand 2 states. [2020-12-22 07:35:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:41,612 INFO L93 Difference]: Finished difference Result 173 states and 291 transitions. [2020-12-22 07:35:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:35:41,614 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:35:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:41,627 INFO L225 Difference]: With dead ends: 173 [2020-12-22 07:35:41,628 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 07:35:41,631 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 07:35:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 07:35:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 07:35:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 07:35:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 183 transitions. [2020-12-22 07:35:41,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 183 transitions. Word has length 37 [2020-12-22 07:35:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:41,681 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 183 transitions. [2020-12-22 07:35:41,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:35:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 183 transitions. [2020-12-22 07:35:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:41,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:41,684 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] [2020-12-22 07:35:41,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:35:41,685 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2020-12-22 07:35:41,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:41,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069023569] [2020-12-22 07:35:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:41,805 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 07:35:41,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069023569] [2020-12-22 07:35:41,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:41,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814893902] [2020-12-22 07:35:41,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:35:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:35:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:35:41,810 INFO L87 Difference]: Start difference. First operand 107 states and 183 transitions. Second operand 5 states. [2020-12-22 07:35:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:42,035 INFO L93 Difference]: Finished difference Result 172 states and 284 transitions. [2020-12-22 07:35:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:35:42,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:35:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:42,038 INFO L225 Difference]: With dead ends: 172 [2020-12-22 07:35:42,038 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 07:35:42,039 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 07:35:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 07:35:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 07:35:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 07:35:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2020-12-22 07:35:42,052 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 37 [2020-12-22 07:35:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,052 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2020-12-22 07:35:42,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:35:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2020-12-22 07:35:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:42,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:42,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:35:42,057 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2020-12-22 07:35:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765721873] [2020-12-22 07:35:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,270 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 07:35:42,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765721873] [2020-12-22 07:35:42,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:42,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480448178] [2020-12-22 07:35:42,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:42,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:42,274 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 3 states. [2020-12-22 07:35:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:42,302 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2020-12-22 07:35:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:42,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:42,306 INFO L225 Difference]: With dead ends: 223 [2020-12-22 07:35:42,306 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 07:35:42,307 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 07:35:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 07:35:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-12-22 07:35:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-22 07:35:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 228 transitions. [2020-12-22 07:35:42,323 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 228 transitions. Word has length 76 [2020-12-22 07:35:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,324 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 228 transitions. [2020-12-22 07:35:42,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 228 transitions. [2020-12-22 07:35:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:42,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:35:42,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2020-12-22 07:35:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299812661] [2020-12-22 07:35:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,442 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 07:35:42,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299812661] [2020-12-22 07:35:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:42,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796493227] [2020-12-22 07:35:42,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:42,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:42,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:42,448 INFO L87 Difference]: Start difference. First operand 160 states and 228 transitions. Second operand 3 states. [2020-12-22 07:35:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:42,493 INFO L93 Difference]: Finished difference Result 376 states and 572 transitions. [2020-12-22 07:35:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:42,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:42,496 INFO L225 Difference]: With dead ends: 376 [2020-12-22 07:35:42,497 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 07:35:42,498 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 07:35:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 07:35:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-12-22 07:35:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 07:35:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 387 transitions. [2020-12-22 07:35:42,523 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 387 transitions. Word has length 76 [2020-12-22 07:35:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,523 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 387 transitions. [2020-12-22 07:35:42,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 387 transitions. [2020-12-22 07:35:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:42,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:42,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:35:42,526 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2020-12-22 07:35:42,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789991361] [2020-12-22 07:35:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,642 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 07:35:42,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789991361] [2020-12-22 07:35:42,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:42,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:42,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716525540] [2020-12-22 07:35:42,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:42,648 INFO L87 Difference]: Start difference. First operand 260 states and 387 transitions. Second operand 3 states. [2020-12-22 07:35:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:42,718 INFO L93 Difference]: Finished difference Result 664 states and 1029 transitions. [2020-12-22 07:35:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:42,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:42,725 INFO L225 Difference]: With dead ends: 664 [2020-12-22 07:35:42,726 INFO L226 Difference]: Without dead ends: 450 [2020-12-22 07:35:42,727 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 07:35:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-12-22 07:35:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-12-22 07:35:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-12-22 07:35:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 683 transitions. [2020-12-22 07:35:42,780 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 683 transitions. Word has length 76 [2020-12-22 07:35:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,781 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 683 transitions. [2020-12-22 07:35:42,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 683 transitions. [2020-12-22 07:35:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:42,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:42,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:35:42,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2020-12-22 07:35:42,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904124644] [2020-12-22 07:35:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,921 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 07:35:42,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904124644] [2020-12-22 07:35:42,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:42,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126551140] [2020-12-22 07:35:42,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:42,925 INFO L87 Difference]: Start difference. First operand 448 states and 683 transitions. Second operand 3 states. [2020-12-22 07:35:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:42,987 INFO L93 Difference]: Finished difference Result 1204 states and 1877 transitions. [2020-12-22 07:35:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:42,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:42,995 INFO L225 Difference]: With dead ends: 1204 [2020-12-22 07:35:42,996 INFO L226 Difference]: Without dead ends: 802 [2020-12-22 07:35:42,997 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 07:35:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-12-22 07:35:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2020-12-22 07:35:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-12-22 07:35:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1231 transitions. [2020-12-22 07:35:43,045 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1231 transitions. Word has length 76 [2020-12-22 07:35:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:43,046 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 1231 transitions. [2020-12-22 07:35:43,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1231 transitions. [2020-12-22 07:35:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:43,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:43,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:35:43,054 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2020-12-22 07:35:43,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:43,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125122529] [2020-12-22 07:35:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:43,179 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 07:35:43,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125122529] [2020-12-22 07:35:43,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:43,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:43,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769212345] [2020-12-22 07:35:43,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:43,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:43,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:43,182 INFO L87 Difference]: Start difference. First operand 800 states and 1231 transitions. Second operand 3 states. [2020-12-22 07:35:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:43,238 INFO L93 Difference]: Finished difference Result 2212 states and 3441 transitions. [2020-12-22 07:35:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:43,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:43,247 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:35:43,247 INFO L226 Difference]: Without dead ends: 1458 [2020-12-22 07:35:43,250 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 07:35:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-22 07:35:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1456. [2020-12-22 07:35:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1456 states. [2020-12-22 07:35:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2239 transitions. [2020-12-22 07:35:43,310 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2239 transitions. Word has length 76 [2020-12-22 07:35:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:43,311 INFO L481 AbstractCegarLoop]: Abstraction has 1456 states and 2239 transitions. [2020-12-22 07:35:43,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2239 transitions. [2020-12-22 07:35:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:43,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:43,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:43,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:35:43,313 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2020-12-22 07:35:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:43,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907161919] [2020-12-22 07:35:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:43,491 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 07:35:43,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907161919] [2020-12-22 07:35:43,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:43,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:43,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978211186] [2020-12-22 07:35:43,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:43,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:43,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:43,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:43,495 INFO L87 Difference]: Start difference. First operand 1456 states and 2239 transitions. Second operand 8 states. [2020-12-22 07:35:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:44,697 INFO L93 Difference]: Finished difference Result 18376 states and 28555 transitions. [2020-12-22 07:35:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:35:44,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-12-22 07:35:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:44,787 INFO L225 Difference]: With dead ends: 18376 [2020-12-22 07:35:44,787 INFO L226 Difference]: Without dead ends: 16966 [2020-12-22 07:35:44,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2020-12-22 07:35:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 2864. [2020-12-22 07:35:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2020-12-22 07:35:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4367 transitions. [2020-12-22 07:35:45,190 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4367 transitions. Word has length 76 [2020-12-22 07:35:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:45,190 INFO L481 AbstractCegarLoop]: Abstraction has 2864 states and 4367 transitions. [2020-12-22 07:35:45,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4367 transitions. [2020-12-22 07:35:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:45,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:45,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:45,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:35:45,192 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2020-12-22 07:35:45,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:45,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183057661] [2020-12-22 07:35:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:45,265 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 07:35:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183057661] [2020-12-22 07:35:45,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:45,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879983896] [2020-12-22 07:35:45,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:45,268 INFO L87 Difference]: Start difference. First operand 2864 states and 4367 transitions. Second operand 3 states. [2020-12-22 07:35:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:45,636 INFO L93 Difference]: Finished difference Result 8148 states and 12401 transitions. [2020-12-22 07:35:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:45,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:45,663 INFO L225 Difference]: With dead ends: 8148 [2020-12-22 07:35:45,663 INFO L226 Difference]: Without dead ends: 5330 [2020-12-22 07:35:45,669 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 07:35:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2020-12-22 07:35:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 5264. [2020-12-22 07:35:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5264 states. [2020-12-22 07:35:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7855 transitions. [2020-12-22 07:35:46,073 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7855 transitions. Word has length 78 [2020-12-22 07:35:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:46,074 INFO L481 AbstractCegarLoop]: Abstraction has 5264 states and 7855 transitions. [2020-12-22 07:35:46,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7855 transitions. [2020-12-22 07:35:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:46,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:46,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:46,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:35:46,076 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2020-12-22 07:35:46,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:46,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353830654] [2020-12-22 07:35:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:46,435 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 07:35:46,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353830654] [2020-12-22 07:35:46,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:46,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123100700] [2020-12-22 07:35:46,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:46,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:46,438 INFO L87 Difference]: Start difference. First operand 5264 states and 7855 transitions. Second operand 8 states. [2020-12-22 07:35:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:47,350 INFO L93 Difference]: Finished difference Result 13078 states and 19602 transitions. [2020-12-22 07:35:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:35:47,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-12-22 07:35:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:47,385 INFO L225 Difference]: With dead ends: 13078 [2020-12-22 07:35:47,386 INFO L226 Difference]: Without dead ends: 7860 [2020-12-22 07:35:47,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:35:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7860 states. [2020-12-22 07:35:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7860 to 5264. [2020-12-22 07:35:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5264 states. [2020-12-22 07:35:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7791 transitions. [2020-12-22 07:35:47,926 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7791 transitions. Word has length 78 [2020-12-22 07:35:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:47,927 INFO L481 AbstractCegarLoop]: Abstraction has 5264 states and 7791 transitions. [2020-12-22 07:35:47,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7791 transitions. [2020-12-22 07:35:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:35:47,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:47,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:47,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:35:47,928 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2020-12-22 07:35:47,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:47,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141632208] [2020-12-22 07:35:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:48,033 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 07:35:48,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141632208] [2020-12-22 07:35:48,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:48,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079318935] [2020-12-22 07:35:48,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:48,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:48,036 INFO L87 Difference]: Start difference. First operand 5264 states and 7791 transitions. Second operand 8 states. [2020-12-22 07:35:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:48,936 INFO L93 Difference]: Finished difference Result 9170 states and 13482 transitions. [2020-12-22 07:35:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:35:48,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 07:35:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:48,956 INFO L225 Difference]: With dead ends: 9170 [2020-12-22 07:35:48,957 INFO L226 Difference]: Without dead ends: 9168 [2020-12-22 07:35:48,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:35:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2020-12-22 07:35:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 5456. [2020-12-22 07:35:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5456 states. [2020-12-22 07:35:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 7951 transitions. [2020-12-22 07:35:49,535 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 7951 transitions. Word has length 79 [2020-12-22 07:35:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:49,535 INFO L481 AbstractCegarLoop]: Abstraction has 5456 states and 7951 transitions. [2020-12-22 07:35:49,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 7951 transitions. [2020-12-22 07:35:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:35:49,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:49,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:49,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:35:49,537 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2020-12-22 07:35:49,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:49,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584394687] [2020-12-22 07:35:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:49,606 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 07:35:49,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584394687] [2020-12-22 07:35:49,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:49,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:49,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573666051] [2020-12-22 07:35:49,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:49,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:49,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:49,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:49,609 INFO L87 Difference]: Start difference. First operand 5456 states and 7951 transitions. Second operand 3 states. [2020-12-22 07:35:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:50,298 INFO L93 Difference]: Finished difference Result 10967 states and 16085 transitions. [2020-12-22 07:35:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:50,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:35:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:50,314 INFO L225 Difference]: With dead ends: 10967 [2020-12-22 07:35:50,314 INFO L226 Difference]: Without dead ends: 7956 [2020-12-22 07:35:50,320 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 07:35:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2020-12-22 07:35:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 7954. [2020-12-22 07:35:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7954 states. [2020-12-22 07:35:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11537 transitions. [2020-12-22 07:35:50,986 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11537 transitions. Word has length 80 [2020-12-22 07:35:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:50,987 INFO L481 AbstractCegarLoop]: Abstraction has 7954 states and 11537 transitions. [2020-12-22 07:35:50,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11537 transitions. [2020-12-22 07:35:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:35:50,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:50,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:50,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:35:50,993 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2045123054, now seen corresponding path program 1 times [2020-12-22 07:35:50,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:50,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402479260] [2020-12-22 07:35:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:35:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402479260] [2020-12-22 07:35:51,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:51,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721893331] [2020-12-22 07:35:51,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:51,170 INFO L87 Difference]: Start difference. First operand 7954 states and 11537 transitions. Second operand 8 states. [2020-12-22 07:35:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:54,297 INFO L93 Difference]: Finished difference Result 56960 states and 82664 transitions. [2020-12-22 07:35:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:35:54,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:35:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:54,490 INFO L225 Difference]: With dead ends: 56960 [2020-12-22 07:35:54,490 INFO L226 Difference]: Without dead ends: 49054 [2020-12-22 07:35:54,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:35:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49054 states. [2020-12-22 07:35:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49054 to 15858. [2020-12-22 07:35:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15858 states. [2020-12-22 07:35:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 22929 transitions. [2020-12-22 07:35:56,249 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 22929 transitions. Word has length 110 [2020-12-22 07:35:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:56,250 INFO L481 AbstractCegarLoop]: Abstraction has 15858 states and 22929 transitions. [2020-12-22 07:35:56,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 22929 transitions. [2020-12-22 07:35:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:35:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:56,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:35:56,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:35:56,257 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash 276340238, now seen corresponding path program 1 times [2020-12-22 07:35:56,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:56,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090364961] [2020-12-22 07:35:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 07:35:56,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090364961] [2020-12-22 07:35:56,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:56,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:56,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060545625] [2020-12-22 07:35:56,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:56,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:56,400 INFO L87 Difference]: Start difference. First operand 15858 states and 22929 transitions. Second operand 8 states. [2020-12-22 07:36:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:00,219 INFO L93 Difference]: Finished difference Result 64864 states and 94056 transitions. [2020-12-22 07:36:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:00,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:00,358 INFO L225 Difference]: With dead ends: 64864 [2020-12-22 07:36:00,358 INFO L226 Difference]: Without dead ends: 56958 [2020-12-22 07:36:00,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56958 states. [2020-12-22 07:36:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56958 to 27730. [2020-12-22 07:36:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27730 states. [2020-12-22 07:36:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39937 transitions. [2020-12-22 07:36:02,679 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39937 transitions. Word has length 110 [2020-12-22 07:36:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:02,679 INFO L481 AbstractCegarLoop]: Abstraction has 27730 states and 39937 transitions. [2020-12-22 07:36:02,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39937 transitions. [2020-12-22 07:36:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:02,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:02,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:02,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:36:02,688 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1407980078, now seen corresponding path program 1 times [2020-12-22 07:36:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:02,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850720522] [2020-12-22 07:36:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:36:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850720522] [2020-12-22 07:36:02,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:02,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577130271] [2020-12-22 07:36:02,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:02,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:02,912 INFO L87 Difference]: Start difference. First operand 27730 states and 39937 transitions. Second operand 8 states. [2020-12-22 07:36:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:07,540 INFO L93 Difference]: Finished difference Result 72768 states and 105448 transitions. [2020-12-22 07:36:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:07,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:07,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:07,650 INFO L225 Difference]: With dead ends: 72768 [2020-12-22 07:36:07,650 INFO L226 Difference]: Without dead ends: 64862 [2020-12-22 07:36:07,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64862 states. [2020-12-22 07:36:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64862 to 35634. [2020-12-22 07:36:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35634 states. [2020-12-22 07:36:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35634 states to 35634 states and 51329 transitions. [2020-12-22 07:36:11,007 INFO L78 Accepts]: Start accepts. Automaton has 35634 states and 51329 transitions. Word has length 110 [2020-12-22 07:36:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:11,008 INFO L481 AbstractCegarLoop]: Abstraction has 35634 states and 51329 transitions. [2020-12-22 07:36:11,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35634 states and 51329 transitions. [2020-12-22 07:36:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:11,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:11,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:11,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:36:11,016 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash 172521038, now seen corresponding path program 1 times [2020-12-22 07:36:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:11,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195384741] [2020-12-22 07:36:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:36:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195384741] [2020-12-22 07:36:11,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:11,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316870289] [2020-12-22 07:36:11,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:11,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:11,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:11,177 INFO L87 Difference]: Start difference. First operand 35634 states and 51329 transitions. Second operand 8 states. [2020-12-22 07:36:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:16,385 INFO L93 Difference]: Finished difference Result 80672 states and 116840 transitions. [2020-12-22 07:36:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:16,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:16,473 INFO L225 Difference]: With dead ends: 80672 [2020-12-22 07:36:16,474 INFO L226 Difference]: Without dead ends: 72766 [2020-12-22 07:36:16,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72766 states. [2020-12-22 07:36:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72766 to 43538. [2020-12-22 07:36:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43538 states. [2020-12-22 07:36:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43538 states to 43538 states and 62721 transitions. [2020-12-22 07:36:20,052 INFO L78 Accepts]: Start accepts. Automaton has 43538 states and 62721 transitions. Word has length 110 [2020-12-22 07:36:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:20,053 INFO L481 AbstractCegarLoop]: Abstraction has 43538 states and 62721 transitions. [2020-12-22 07:36:20,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43538 states and 62721 transitions. [2020-12-22 07:36:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:20,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:20,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:20,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:36:20,063 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1248474514, now seen corresponding path program 1 times [2020-12-22 07:36:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:20,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696787944] [2020-12-22 07:36:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:36:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696787944] [2020-12-22 07:36:20,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:20,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:20,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320265796] [2020-12-22 07:36:20,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:20,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:20,218 INFO L87 Difference]: Start difference. First operand 43538 states and 62721 transitions. Second operand 8 states. [2020-12-22 07:36:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:26,221 INFO L93 Difference]: Finished difference Result 88576 states and 128232 transitions. [2020-12-22 07:36:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:26,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:26,316 INFO L225 Difference]: With dead ends: 88576 [2020-12-22 07:36:26,317 INFO L226 Difference]: Without dead ends: 80670 [2020-12-22 07:36:26,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80670 states. [2020-12-22 07:36:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80670 to 51442. [2020-12-22 07:36:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51442 states. [2020-12-22 07:36:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 74113 transitions. [2020-12-22 07:36:30,706 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 74113 transitions. Word has length 110 [2020-12-22 07:36:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,706 INFO L481 AbstractCegarLoop]: Abstraction has 51442 states and 74113 transitions. [2020-12-22 07:36:30,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 74113 transitions. [2020-12-22 07:36:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:36:30,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:36:30,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:36:30,718 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1214001382, now seen corresponding path program 1 times [2020-12-22 07:36:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074419366] [2020-12-22 07:36:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074419366] [2020-12-22 07:36:30,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:30,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872925253] [2020-12-22 07:36:30,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:30,778 INFO L87 Difference]: Start difference. First operand 51442 states and 74113 transitions. Second operand 3 states. [2020-12-22 07:36:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:33,827 INFO L93 Difference]: Finished difference Result 87255 states and 126155 transitions. [2020-12-22 07:36:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:33,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:36:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:33,869 INFO L225 Difference]: With dead ends: 87255 [2020-12-22 07:36:33,869 INFO L226 Difference]: Without dead ends: 35861 [2020-12-22 07:36:33,903 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 07:36:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35861 states. [2020-12-22 07:36:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35861 to 35859. [2020-12-22 07:36:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35859 states. [2020-12-22 07:36:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35859 states to 35859 states and 51672 transitions. [2020-12-22 07:36:36,911 INFO L78 Accepts]: Start accepts. Automaton has 35859 states and 51672 transitions. Word has length 112 [2020-12-22 07:36:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:36,912 INFO L481 AbstractCegarLoop]: Abstraction has 35859 states and 51672 transitions. [2020-12-22 07:36:36,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 35859 states and 51672 transitions. [2020-12-22 07:36:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:36:36,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:36,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:36,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:36:36,922 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1083421453, now seen corresponding path program 1 times [2020-12-22 07:36:36,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:36,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554325900] [2020-12-22 07:36:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:36:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554325900] [2020-12-22 07:36:37,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:37,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941010933] [2020-12-22 07:36:37,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:37,201 INFO L87 Difference]: Start difference. First operand 35859 states and 51672 transitions. Second operand 8 states. [2020-12-22 07:36:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:42,442 INFO L93 Difference]: Finished difference Result 68897 states and 99679 transitions. [2020-12-22 07:36:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:42,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 07:36:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:42,495 INFO L225 Difference]: With dead ends: 68897 [2020-12-22 07:36:42,495 INFO L226 Difference]: Without dead ends: 63391 [2020-12-22 07:36:42,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2020-12-22 07:36:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 41363. [2020-12-22 07:36:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41363 states. [2020-12-22 07:36:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41363 states to 41363 states and 59608 transitions. [2020-12-22 07:36:46,319 INFO L78 Accepts]: Start accepts. Automaton has 41363 states and 59608 transitions. Word has length 112 [2020-12-22 07:36:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:46,320 INFO L481 AbstractCegarLoop]: Abstraction has 41363 states and 59608 transitions. [2020-12-22 07:36:46,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41363 states and 59608 transitions. [2020-12-22 07:36:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 07:36:46,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:46,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:46,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:36:46,328 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1698985365, now seen corresponding path program 1 times [2020-12-22 07:36:46,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:46,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896740829] [2020-12-22 07:36:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:36:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896740829] [2020-12-22 07:36:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048014598] [2020-12-22 07:36:46,698 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 07:36:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:36:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:36:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:36:47,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:36:47,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:36:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667620966] [2020-12-22 07:36:47,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:36:47,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:36:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:36:47,361 INFO L87 Difference]: Start difference. First operand 41363 states and 59608 transitions. Second operand 12 states. [2020-12-22 07:36:52,623 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-22 07:37:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:13,825 INFO L93 Difference]: Finished difference Result 271960 states and 386714 transitions. [2020-12-22 07:37:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 07:37:13,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-12-22 07:37:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:14,532 INFO L225 Difference]: With dead ends: 271960 [2020-12-22 07:37:14,533 INFO L226 Difference]: Without dead ends: 230678 [2020-12-22 07:37:14,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=578, Invalid=2074, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 07:37:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230678 states. [2020-12-22 07:37:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230678 to 132496. [2020-12-22 07:37:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132496 states. [2020-12-22 07:37:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132496 states to 132496 states and 186150 transitions. [2020-12-22 07:37:30,169 INFO L78 Accepts]: Start accepts. Automaton has 132496 states and 186150 transitions. Word has length 113 [2020-12-22 07:37:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:30,169 INFO L481 AbstractCegarLoop]: Abstraction has 132496 states and 186150 transitions. [2020-12-22 07:37:30,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:37:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 132496 states and 186150 transitions. [2020-12-22 07:37:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 07:37:30,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:30,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:30,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:37:30,403 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -862135715, now seen corresponding path program 1 times [2020-12-22 07:37:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:30,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332231025] [2020-12-22 07:37:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:30,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332231025] [2020-12-22 07:37:30,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946014038] [2020-12-22 07:37:30,697 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 07:37:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 07:37:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:37:31,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:37:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:31,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:37:31,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:37:31,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654568249] [2020-12-22 07:37:31,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:37:31,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:37:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:37:31,710 INFO L87 Difference]: Start difference. First operand 132496 states and 186150 transitions. Second operand 17 states. [2020-12-22 07:37:33,008 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 07:38:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:47,340 INFO L93 Difference]: Finished difference Result 762326 states and 1061813 transitions. [2020-12-22 07:38:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 07:38:47,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-12-22 07:38:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:48,658 INFO L225 Difference]: With dead ends: 762326 [2020-12-22 07:38:48,658 INFO L226 Difference]: Without dead ends: 646377 [2020-12-22 07:38:48,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 07:38:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646377 states. [2020-12-22 07:39:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646377 to 301644. [2020-12-22 07:39:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301644 states. [2020-12-22 07:39:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301644 states to 301644 states and 422317 transitions. [2020-12-22 07:39:28,206 INFO L78 Accepts]: Start accepts. Automaton has 301644 states and 422317 transitions. Word has length 114 [2020-12-22 07:39:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:28,207 INFO L481 AbstractCegarLoop]: Abstraction has 301644 states and 422317 transitions. [2020-12-22 07:39:28,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:39:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 301644 states and 422317 transitions. [2020-12-22 07:39:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 07:39:28,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:28,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:28,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:39:28,437 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash 355849683, now seen corresponding path program 1 times [2020-12-22 07:39:28,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:28,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955773236] [2020-12-22 07:39:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:28,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955773236] [2020-12-22 07:39:28,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:28,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213071334] [2020-12-22 07:39:28,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:28,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:28,516 INFO L87 Difference]: Start difference. First operand 301644 states and 422317 transitions. Second operand 3 states.