/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/systemc/token_ring.09.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:24,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:24,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:24,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:24,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:24,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:24,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:24,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:24,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:24,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:24,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:24,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:24,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:24,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:24,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:24,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:24,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:24,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:24,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:24,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:24,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:24,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:24,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:24,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:24,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:24,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:24,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:24,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:24,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:24,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:24,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:24,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:24,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:24,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:24,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:24,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:24,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:24,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:24,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:24,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:24,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:24,158 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:24,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:24,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:24,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:24,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:24,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:24,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:24,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:24,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:24,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:24,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:24,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:24,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:24,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:24,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:24,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:24,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:24,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:24,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:24,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:24,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:24,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:24,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:24,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:24,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:24,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:24,630 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:24,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2020-12-22 07:10:24,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d86568c/dfde3846c4d64ce892effa89ebc47f94/FLAGe6b259f89 [2020-12-22 07:10:25,345 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:25,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2020-12-22 07:10:25,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d86568c/dfde3846c4d64ce892effa89ebc47f94/FLAGe6b259f89 [2020-12-22 07:10:25,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d86568c/dfde3846c4d64ce892effa89ebc47f94 [2020-12-22 07:10:25,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:25,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:25,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:25,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:25,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:25,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:25" (1/1) ... [2020-12-22 07:10:25,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aaf3209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:25, skipping insertion in model container [2020-12-22 07:10:25,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:25" (1/1) ... [2020-12-22 07:10:25,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:25,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:25,874 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/systemc/token_ring.09.cil-2.c[366,379] [2020-12-22 07:10:26,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:26,085 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:26,101 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/systemc/token_ring.09.cil-2.c[366,379] [2020-12-22 07:10:26,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:26,296 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:26,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26 WrapperNode [2020-12-22 07:10:26,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:26,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:26,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:26,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:26,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:26,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:26,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:26,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:26,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (1/1) ... [2020-12-22 07:10:26,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:26,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:26,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:26,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:26,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (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 07:10:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:26,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:26,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:26,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:29,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:29,262 INFO L299 CfgBuilder]: Removed 378 assume(true) statements. [2020-12-22 07:10:29,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:29 BoogieIcfgContainer [2020-12-22 07:10:29,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:29,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:29,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:29,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:29,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:25" (1/3) ... [2020-12-22 07:10:29,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fabf33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:29, skipping insertion in model container [2020-12-22 07:10:29,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:26" (2/3) ... [2020-12-22 07:10:29,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fabf33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:29, skipping insertion in model container [2020-12-22 07:10:29,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:29" (3/3) ... [2020-12-22 07:10:29,275 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-2.c [2020-12-22 07:10:29,281 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:29,287 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:10:29,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:10:29,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:29,340 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:29,340 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:29,340 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:29,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:29,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:29,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:29,341 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states. [2020-12-22 07:10:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:29,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:29,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:29,403 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash 63539704, now seen corresponding path program 1 times [2020-12-22 07:10:29,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:29,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186919863] [2020-12-22 07:10:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:29,814 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 07:10:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186919863] [2020-12-22 07:10:29,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:29,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102843958] [2020-12-22 07:10:29,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:29,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:29,842 INFO L87 Difference]: Start difference. First operand 1156 states. Second operand 3 states. [2020-12-22 07:10:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:30,000 INFO L93 Difference]: Finished difference Result 2307 states and 3511 transitions. [2020-12-22 07:10:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:30,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:30,051 INFO L225 Difference]: With dead ends: 2307 [2020-12-22 07:10:30,053 INFO L226 Difference]: Without dead ends: 1152 [2020-12-22 07:10:30,069 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 07:10:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-12-22 07:10:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2020-12-22 07:10:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2020-12-22 07:10:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1728 transitions. [2020-12-22 07:10:30,221 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1728 transitions. Word has length 127 [2020-12-22 07:10:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:30,221 INFO L481 AbstractCegarLoop]: Abstraction has 1152 states and 1728 transitions. [2020-12-22 07:10:30,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1728 transitions. [2020-12-22 07:10:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:30,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:30,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:30,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:30,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -798293898, now seen corresponding path program 1 times [2020-12-22 07:10:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:30,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081469250] [2020-12-22 07:10:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:30,382 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 07:10:30,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081469250] [2020-12-22 07:10:30,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:30,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:30,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381187686] [2020-12-22 07:10:30,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:30,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:30,386 INFO L87 Difference]: Start difference. First operand 1152 states and 1728 transitions. Second operand 3 states. [2020-12-22 07:10:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:30,452 INFO L93 Difference]: Finished difference Result 2291 states and 3434 transitions. [2020-12-22 07:10:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:30,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:30,459 INFO L225 Difference]: With dead ends: 2291 [2020-12-22 07:10:30,459 INFO L226 Difference]: Without dead ends: 1152 [2020-12-22 07:10:30,462 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 07:10:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-12-22 07:10:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2020-12-22 07:10:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2020-12-22 07:10:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1727 transitions. [2020-12-22 07:10:30,510 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1727 transitions. Word has length 127 [2020-12-22 07:10:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:30,510 INFO L481 AbstractCegarLoop]: Abstraction has 1152 states and 1727 transitions. [2020-12-22 07:10:30,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1727 transitions. [2020-12-22 07:10:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:30,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:30,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:30,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:30,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1567741172, now seen corresponding path program 1 times [2020-12-22 07:10:30,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301876579] [2020-12-22 07:10:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:30,634 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 07:10:30,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301876579] [2020-12-22 07:10:30,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:30,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940621120] [2020-12-22 07:10:30,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:30,641 INFO L87 Difference]: Start difference. First operand 1152 states and 1727 transitions. Second operand 3 states. [2020-12-22 07:10:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:30,764 INFO L93 Difference]: Finished difference Result 3248 states and 4855 transitions. [2020-12-22 07:10:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:30,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:30,776 INFO L225 Difference]: With dead ends: 3248 [2020-12-22 07:10:30,777 INFO L226 Difference]: Without dead ends: 2110 [2020-12-22 07:10:30,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-12-22 07:10:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2106. [2020-12-22 07:10:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3145 transitions. [2020-12-22 07:10:30,909 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3145 transitions. Word has length 127 [2020-12-22 07:10:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:30,916 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3145 transitions. [2020-12-22 07:10:30,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3145 transitions. [2020-12-22 07:10:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:30,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:30,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:30,922 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1325644144, now seen corresponding path program 1 times [2020-12-22 07:10:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848057894] [2020-12-22 07:10:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:31,112 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 07:10:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848057894] [2020-12-22 07:10:31,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:31,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105727808] [2020-12-22 07:10:31,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:31,117 INFO L87 Difference]: Start difference. First operand 2106 states and 3145 transitions. Second operand 4 states. [2020-12-22 07:10:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:31,423 INFO L93 Difference]: Finished difference Result 5154 states and 7686 transitions. [2020-12-22 07:10:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:31,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:31,447 INFO L225 Difference]: With dead ends: 5154 [2020-12-22 07:10:31,447 INFO L226 Difference]: Without dead ends: 3063 [2020-12-22 07:10:31,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2020-12-22 07:10:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2106. [2020-12-22 07:10:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3142 transitions. [2020-12-22 07:10:31,611 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3142 transitions. Word has length 127 [2020-12-22 07:10:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:31,611 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3142 transitions. [2020-12-22 07:10:31,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3142 transitions. [2020-12-22 07:10:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:31,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:31,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:31,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:31,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1242178190, now seen corresponding path program 1 times [2020-12-22 07:10:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:31,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437710569] [2020-12-22 07:10:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:31,774 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 07:10:31,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437710569] [2020-12-22 07:10:31,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:31,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:31,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343742568] [2020-12-22 07:10:31,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:31,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:31,780 INFO L87 Difference]: Start difference. First operand 2106 states and 3142 transitions. Second operand 4 states. [2020-12-22 07:10:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:32,136 INFO L93 Difference]: Finished difference Result 5152 states and 7676 transitions. [2020-12-22 07:10:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:32,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:32,155 INFO L225 Difference]: With dead ends: 5152 [2020-12-22 07:10:32,155 INFO L226 Difference]: Without dead ends: 3062 [2020-12-22 07:10:32,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2020-12-22 07:10:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2106. [2020-12-22 07:10:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3139 transitions. [2020-12-22 07:10:32,292 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3139 transitions. Word has length 127 [2020-12-22 07:10:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:32,292 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3139 transitions. [2020-12-22 07:10:32,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3139 transitions. [2020-12-22 07:10:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:32,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:32,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:32,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:32,295 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash -770821840, now seen corresponding path program 1 times [2020-12-22 07:10:32,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:32,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369970851] [2020-12-22 07:10:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:32,392 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 07:10:32,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369970851] [2020-12-22 07:10:32,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:32,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655749713] [2020-12-22 07:10:32,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:32,395 INFO L87 Difference]: Start difference. First operand 2106 states and 3139 transitions. Second operand 4 states. [2020-12-22 07:10:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:32,660 INFO L93 Difference]: Finished difference Result 5150 states and 7666 transitions. [2020-12-22 07:10:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:32,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:32,676 INFO L225 Difference]: With dead ends: 5150 [2020-12-22 07:10:32,676 INFO L226 Difference]: Without dead ends: 3061 [2020-12-22 07:10:32,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2020-12-22 07:10:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 2106. [2020-12-22 07:10:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3136 transitions. [2020-12-22 07:10:32,870 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3136 transitions. Word has length 127 [2020-12-22 07:10:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:32,870 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3136 transitions. [2020-12-22 07:10:32,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:32,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3136 transitions. [2020-12-22 07:10:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:32,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:32,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:32,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:32,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1876782514, now seen corresponding path program 1 times [2020-12-22 07:10:32,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:32,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743499042] [2020-12-22 07:10:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:32,954 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 07:10:32,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743499042] [2020-12-22 07:10:32,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:32,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349198160] [2020-12-22 07:10:32,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:32,957 INFO L87 Difference]: Start difference. First operand 2106 states and 3136 transitions. Second operand 3 states. [2020-12-22 07:10:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:33,095 INFO L93 Difference]: Finished difference Result 4194 states and 6245 transitions. [2020-12-22 07:10:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:33,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:33,106 INFO L225 Difference]: With dead ends: 4194 [2020-12-22 07:10:33,106 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 07:10:33,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 07:10:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2020-12-22 07:10:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3128 transitions. [2020-12-22 07:10:33,253 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3128 transitions. Word has length 127 [2020-12-22 07:10:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:33,253 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3128 transitions. [2020-12-22 07:10:33,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3128 transitions. [2020-12-22 07:10:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:33,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:33,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:33,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:33,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -231935954, now seen corresponding path program 1 times [2020-12-22 07:10:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:33,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040395228] [2020-12-22 07:10:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:33,325 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 07:10:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040395228] [2020-12-22 07:10:33,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:33,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131065050] [2020-12-22 07:10:33,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:33,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:33,328 INFO L87 Difference]: Start difference. First operand 2106 states and 3128 transitions. Second operand 3 states. [2020-12-22 07:10:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:33,489 INFO L93 Difference]: Finished difference Result 4193 states and 6228 transitions. [2020-12-22 07:10:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:33,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:33,501 INFO L225 Difference]: With dead ends: 4193 [2020-12-22 07:10:33,501 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 07:10:33,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 07:10:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2020-12-22 07:10:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3120 transitions. [2020-12-22 07:10:33,626 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3120 transitions. Word has length 127 [2020-12-22 07:10:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:33,626 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3120 transitions. [2020-12-22 07:10:33,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3120 transitions. [2020-12-22 07:10:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:33,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:33,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:33,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:33,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash 115682866, now seen corresponding path program 1 times [2020-12-22 07:10:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:33,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560386309] [2020-12-22 07:10:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:33,697 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 07:10:33,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560386309] [2020-12-22 07:10:33,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520168172] [2020-12-22 07:10:33,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:33,706 INFO L87 Difference]: Start difference. First operand 2106 states and 3120 transitions. Second operand 4 states. [2020-12-22 07:10:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:34,017 INFO L93 Difference]: Finished difference Result 5144 states and 7614 transitions. [2020-12-22 07:10:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:34,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:34,034 INFO L225 Difference]: With dead ends: 5144 [2020-12-22 07:10:34,034 INFO L226 Difference]: Without dead ends: 3058 [2020-12-22 07:10:34,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2020-12-22 07:10:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2106. [2020-12-22 07:10:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3117 transitions. [2020-12-22 07:10:34,195 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3117 transitions. Word has length 127 [2020-12-22 07:10:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:34,196 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3117 transitions. [2020-12-22 07:10:34,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3117 transitions. [2020-12-22 07:10:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:34,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:34,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:34,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:34,198 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1857482512, now seen corresponding path program 1 times [2020-12-22 07:10:34,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:34,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775704259] [2020-12-22 07:10:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,263 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 07:10:34,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775704259] [2020-12-22 07:10:34,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:34,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664854467] [2020-12-22 07:10:34,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:34,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:34,266 INFO L87 Difference]: Start difference. First operand 2106 states and 3117 transitions. Second operand 4 states. [2020-12-22 07:10:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:34,557 INFO L93 Difference]: Finished difference Result 5140 states and 7600 transitions. [2020-12-22 07:10:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:34,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:34,574 INFO L225 Difference]: With dead ends: 5140 [2020-12-22 07:10:34,574 INFO L226 Difference]: Without dead ends: 3056 [2020-12-22 07:10:34,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2020-12-22 07:10:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2106. [2020-12-22 07:10:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3114 transitions. [2020-12-22 07:10:34,710 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3114 transitions. Word has length 127 [2020-12-22 07:10:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:34,711 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3114 transitions. [2020-12-22 07:10:34,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3114 transitions. [2020-12-22 07:10:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:34,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:34,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:34,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:34,713 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1814203182, now seen corresponding path program 1 times [2020-12-22 07:10:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:34,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268642162] [2020-12-22 07:10:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,762 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 07:10:34,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268642162] [2020-12-22 07:10:34,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:34,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874645416] [2020-12-22 07:10:34,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:34,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:34,765 INFO L87 Difference]: Start difference. First operand 2106 states and 3114 transitions. Second operand 4 states. [2020-12-22 07:10:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,032 INFO L93 Difference]: Finished difference Result 5138 states and 7590 transitions. [2020-12-22 07:10:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:35,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:35,049 INFO L225 Difference]: With dead ends: 5138 [2020-12-22 07:10:35,049 INFO L226 Difference]: Without dead ends: 3055 [2020-12-22 07:10:35,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2020-12-22 07:10:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2106. [2020-12-22 07:10:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3111 transitions. [2020-12-22 07:10:35,189 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3111 transitions. Word has length 127 [2020-12-22 07:10:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:35,190 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3111 transitions. [2020-12-22 07:10:35,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3111 transitions. [2020-12-22 07:10:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:35,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:35,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:35,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:35,192 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1932644656, now seen corresponding path program 1 times [2020-12-22 07:10:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:35,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231992867] [2020-12-22 07:10:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:35,240 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 07:10:35,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231992867] [2020-12-22 07:10:35,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:35,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:35,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453070291] [2020-12-22 07:10:35,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:35,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:35,243 INFO L87 Difference]: Start difference. First operand 2106 states and 3111 transitions. Second operand 4 states. [2020-12-22 07:10:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,571 INFO L93 Difference]: Finished difference Result 5066 states and 7480 transitions. [2020-12-22 07:10:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:35,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:35,579 INFO L225 Difference]: With dead ends: 5066 [2020-12-22 07:10:35,580 INFO L226 Difference]: Without dead ends: 2984 [2020-12-22 07:10:35,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-12-22 07:10:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2106. [2020-12-22 07:10:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3108 transitions. [2020-12-22 07:10:35,737 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3108 transitions. Word has length 127 [2020-12-22 07:10:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:35,737 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3108 transitions. [2020-12-22 07:10:35,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3108 transitions. [2020-12-22 07:10:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:35,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:35,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:35,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:35,740 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -973028626, now seen corresponding path program 1 times [2020-12-22 07:10:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:35,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886282599] [2020-12-22 07:10:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:35,795 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 07:10:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886282599] [2020-12-22 07:10:35,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:35,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:35,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323992086] [2020-12-22 07:10:35,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:35,797 INFO L87 Difference]: Start difference. First operand 2106 states and 3108 transitions. Second operand 4 states. [2020-12-22 07:10:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:36,134 INFO L93 Difference]: Finished difference Result 5064 states and 7470 transitions. [2020-12-22 07:10:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:36,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:36,143 INFO L225 Difference]: With dead ends: 5064 [2020-12-22 07:10:36,143 INFO L226 Difference]: Without dead ends: 2983 [2020-12-22 07:10:36,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2020-12-22 07:10:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2106. [2020-12-22 07:10:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3105 transitions. [2020-12-22 07:10:36,327 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3105 transitions. Word has length 127 [2020-12-22 07:10:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:36,327 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3105 transitions. [2020-12-22 07:10:36,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3105 transitions. [2020-12-22 07:10:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:36,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:36,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:10:36,329 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1288544624, now seen corresponding path program 1 times [2020-12-22 07:10:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:36,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827075216] [2020-12-22 07:10:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:36,380 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 07:10:36,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827075216] [2020-12-22 07:10:36,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:36,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:36,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051005470] [2020-12-22 07:10:36,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:36,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:36,383 INFO L87 Difference]: Start difference. First operand 2106 states and 3105 transitions. Second operand 3 states. [2020-12-22 07:10:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:36,571 INFO L93 Difference]: Finished difference Result 4186 states and 6174 transitions. [2020-12-22 07:10:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:36,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:36,577 INFO L225 Difference]: With dead ends: 4186 [2020-12-22 07:10:36,577 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 07:10:36,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 07:10:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2020-12-22 07:10:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3075 transitions. [2020-12-22 07:10:36,719 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3075 transitions. Word has length 127 [2020-12-22 07:10:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:36,719 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3075 transitions. [2020-12-22 07:10:36,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3075 transitions. [2020-12-22 07:10:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:36,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:36,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:36,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:10:36,721 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash -359309332, now seen corresponding path program 1 times [2020-12-22 07:10:36,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:36,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079015694] [2020-12-22 07:10:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:36,775 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 07:10:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079015694] [2020-12-22 07:10:36,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:36,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:36,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811813403] [2020-12-22 07:10:36,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:36,778 INFO L87 Difference]: Start difference. First operand 2106 states and 3075 transitions. Second operand 4 states. [2020-12-22 07:10:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:37,205 INFO L93 Difference]: Finished difference Result 5060 states and 7386 transitions. [2020-12-22 07:10:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:37,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:37,214 INFO L225 Difference]: With dead ends: 5060 [2020-12-22 07:10:37,214 INFO L226 Difference]: Without dead ends: 2981 [2020-12-22 07:10:37,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2020-12-22 07:10:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2106. [2020-12-22 07:10:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3072 transitions. [2020-12-22 07:10:37,385 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3072 transitions. Word has length 127 [2020-12-22 07:10:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:37,385 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3072 transitions. [2020-12-22 07:10:37,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3072 transitions. [2020-12-22 07:10:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:37,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:37,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:37,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:10:37,387 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1666451730, now seen corresponding path program 1 times [2020-12-22 07:10:37,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110947441] [2020-12-22 07:10:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:37,442 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 07:10:37,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110947441] [2020-12-22 07:10:37,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:37,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087131752] [2020-12-22 07:10:37,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:37,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:37,444 INFO L87 Difference]: Start difference. First operand 2106 states and 3072 transitions. Second operand 4 states. [2020-12-22 07:10:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:37,817 INFO L93 Difference]: Finished difference Result 5058 states and 7376 transitions. [2020-12-22 07:10:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:37,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:37,824 INFO L225 Difference]: With dead ends: 5058 [2020-12-22 07:10:37,825 INFO L226 Difference]: Without dead ends: 2980 [2020-12-22 07:10:37,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-12-22 07:10:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2106. [2020-12-22 07:10:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3069 transitions. [2020-12-22 07:10:37,999 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3069 transitions. Word has length 127 [2020-12-22 07:10:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:37,999 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3069 transitions. [2020-12-22 07:10:37,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3069 transitions. [2020-12-22 07:10:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:38,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:38,001 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:38,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:10:38,001 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 231045036, now seen corresponding path program 1 times [2020-12-22 07:10:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:38,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842865519] [2020-12-22 07:10:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:38,050 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 07:10:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842865519] [2020-12-22 07:10:38,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:38,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643803486] [2020-12-22 07:10:38,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:38,053 INFO L87 Difference]: Start difference. First operand 2106 states and 3069 transitions. Second operand 4 states. [2020-12-22 07:10:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:38,420 INFO L93 Difference]: Finished difference Result 5054 states and 7362 transitions. [2020-12-22 07:10:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:38,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:38,427 INFO L225 Difference]: With dead ends: 5054 [2020-12-22 07:10:38,427 INFO L226 Difference]: Without dead ends: 2978 [2020-12-22 07:10:38,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2020-12-22 07:10:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2106. [2020-12-22 07:10:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3066 transitions. [2020-12-22 07:10:38,587 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3066 transitions. Word has length 127 [2020-12-22 07:10:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:38,587 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3066 transitions. [2020-12-22 07:10:38,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3066 transitions. [2020-12-22 07:10:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:38,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:38,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:38,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:10:38,589 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1675358230, now seen corresponding path program 1 times [2020-12-22 07:10:38,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:38,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255881743] [2020-12-22 07:10:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:38,667 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 07:10:38,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255881743] [2020-12-22 07:10:38,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:38,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:38,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424660382] [2020-12-22 07:10:38,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:38,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:38,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:38,670 INFO L87 Difference]: Start difference. First operand 2106 states and 3066 transitions. Second operand 4 states. [2020-12-22 07:10:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:39,031 INFO L93 Difference]: Finished difference Result 5052 states and 7352 transitions. [2020-12-22 07:10:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:39,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,039 INFO L225 Difference]: With dead ends: 5052 [2020-12-22 07:10:39,039 INFO L226 Difference]: Without dead ends: 2977 [2020-12-22 07:10:39,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2020-12-22 07:10:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2106. [2020-12-22 07:10:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3063 transitions. [2020-12-22 07:10:39,215 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3063 transitions. Word has length 127 [2020-12-22 07:10:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:39,215 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3063 transitions. [2020-12-22 07:10:39,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3063 transitions. [2020-12-22 07:10:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:39,217 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:39,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:10:39,217 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -74287124, now seen corresponding path program 1 times [2020-12-22 07:10:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266634324] [2020-12-22 07:10:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:39,267 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 07:10:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266634324] [2020-12-22 07:10:39,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:39,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521428482] [2020-12-22 07:10:39,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:39,270 INFO L87 Difference]: Start difference. First operand 2106 states and 3063 transitions. Second operand 4 states. [2020-12-22 07:10:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:39,675 INFO L93 Difference]: Finished difference Result 5050 states and 7342 transitions. [2020-12-22 07:10:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:39,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,682 INFO L225 Difference]: With dead ends: 5050 [2020-12-22 07:10:39,682 INFO L226 Difference]: Without dead ends: 2976 [2020-12-22 07:10:39,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2020-12-22 07:10:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2106. [2020-12-22 07:10:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3060 transitions. [2020-12-22 07:10:39,859 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3060 transitions. Word has length 127 [2020-12-22 07:10:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:39,859 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3060 transitions. [2020-12-22 07:10:39,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3060 transitions. [2020-12-22 07:10:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:39,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:39,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:39,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:10:39,862 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1131018326, now seen corresponding path program 1 times [2020-12-22 07:10:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:39,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065394878] [2020-12-22 07:10:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:39,910 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 07:10:39,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065394878] [2020-12-22 07:10:39,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:39,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011250653] [2020-12-22 07:10:39,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:39,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:39,912 INFO L87 Difference]: Start difference. First operand 2106 states and 3060 transitions. Second operand 4 states. [2020-12-22 07:10:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:40,359 INFO L93 Difference]: Finished difference Result 5048 states and 7332 transitions. [2020-12-22 07:10:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:40,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:40,366 INFO L225 Difference]: With dead ends: 5048 [2020-12-22 07:10:40,366 INFO L226 Difference]: Without dead ends: 2975 [2020-12-22 07:10:40,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2020-12-22 07:10:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2106. [2020-12-22 07:10:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2020-12-22 07:10:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3057 transitions. [2020-12-22 07:10:40,558 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3057 transitions. Word has length 127 [2020-12-22 07:10:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:40,559 INFO L481 AbstractCegarLoop]: Abstraction has 2106 states and 3057 transitions. [2020-12-22 07:10:40,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3057 transitions. [2020-12-22 07:10:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:40,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:40,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:40,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:10:40,561 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 220366892, now seen corresponding path program 1 times [2020-12-22 07:10:40,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:40,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885382340] [2020-12-22 07:10:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:40,612 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 07:10:40,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885382340] [2020-12-22 07:10:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834956449] [2020-12-22 07:10:40,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:40,615 INFO L87 Difference]: Start difference. First operand 2106 states and 3057 transitions. Second operand 4 states. [2020-12-22 07:10:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:41,350 INFO L93 Difference]: Finished difference Result 7900 states and 11438 transitions. [2020-12-22 07:10:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:41,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:41,361 INFO L225 Difference]: With dead ends: 7900 [2020-12-22 07:10:41,361 INFO L226 Difference]: Without dead ends: 5829 [2020-12-22 07:10:41,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2020-12-22 07:10:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 5557. [2020-12-22 07:10:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5557 states. [2020-12-22 07:10:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 7984 transitions. [2020-12-22 07:10:41,844 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 7984 transitions. Word has length 127 [2020-12-22 07:10:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:41,844 INFO L481 AbstractCegarLoop]: Abstraction has 5557 states and 7984 transitions. [2020-12-22 07:10:41,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 7984 transitions. [2020-12-22 07:10:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:41,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:41,847 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:41,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:10:41,848 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1762999400, now seen corresponding path program 1 times [2020-12-22 07:10:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:41,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334590435] [2020-12-22 07:10:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:41,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334590435] [2020-12-22 07:10:41,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081763245] [2020-12-22 07:10:41,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:41,922 INFO L87 Difference]: Start difference. First operand 5557 states and 7984 transitions. Second operand 5 states. [2020-12-22 07:10:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:42,940 INFO L93 Difference]: Finished difference Result 14667 states and 21117 transitions. [2020-12-22 07:10:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:42,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 07:10:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:42,962 INFO L225 Difference]: With dead ends: 14667 [2020-12-22 07:10:42,962 INFO L226 Difference]: Without dead ends: 9155 [2020-12-22 07:10:42,973 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 07:10:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2020-12-22 07:10:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 5626. [2020-12-22 07:10:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5626 states. [2020-12-22 07:10:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 8012 transitions. [2020-12-22 07:10:43,483 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 8012 transitions. Word has length 147 [2020-12-22 07:10:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:43,483 INFO L481 AbstractCegarLoop]: Abstraction has 5626 states and 8012 transitions. [2020-12-22 07:10:43,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 8012 transitions. [2020-12-22 07:10:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:43,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:43,486 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:43,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:10:43,487 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:43,487 INFO L82 PathProgramCache]: Analyzing trace with hash -270394646, now seen corresponding path program 1 times [2020-12-22 07:10:43,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:43,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368847681] [2020-12-22 07:10:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:43,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368847681] [2020-12-22 07:10:43,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:43,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639250711] [2020-12-22 07:10:43,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:43,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:43,544 INFO L87 Difference]: Start difference. First operand 5626 states and 8012 transitions. Second operand 5 states. [2020-12-22 07:10:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:44,345 INFO L93 Difference]: Finished difference Result 12340 states and 17551 transitions. [2020-12-22 07:10:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:44,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 07:10:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:44,357 INFO L225 Difference]: With dead ends: 12340 [2020-12-22 07:10:44,357 INFO L226 Difference]: Without dead ends: 6766 [2020-12-22 07:10:44,368 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 07:10:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2020-12-22 07:10:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 5632. [2020-12-22 07:10:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5632 states. [2020-12-22 07:10:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5632 states to 5632 states and 7956 transitions. [2020-12-22 07:10:44,979 INFO L78 Accepts]: Start accepts. Automaton has 5632 states and 7956 transitions. Word has length 147 [2020-12-22 07:10:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:44,979 INFO L481 AbstractCegarLoop]: Abstraction has 5632 states and 7956 transitions. [2020-12-22 07:10:44,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5632 states and 7956 transitions. [2020-12-22 07:10:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:44,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:44,983 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:44,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:10:44,984 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1330676460, now seen corresponding path program 1 times [2020-12-22 07:10:44,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:44,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075739604] [2020-12-22 07:10:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075739604] [2020-12-22 07:10:45,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:45,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:45,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727575827] [2020-12-22 07:10:45,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:45,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:45,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:45,073 INFO L87 Difference]: Start difference. First operand 5632 states and 7956 transitions. Second operand 4 states. [2020-12-22 07:10:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:46,542 INFO L93 Difference]: Finished difference Result 21479 states and 30297 transitions. [2020-12-22 07:10:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:46,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-12-22 07:10:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:46,557 INFO L225 Difference]: With dead ends: 21479 [2020-12-22 07:10:46,557 INFO L226 Difference]: Without dead ends: 15901 [2020-12-22 07:10:46,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15901 states. [2020-12-22 07:10:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15901 to 15287. [2020-12-22 07:10:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15287 states. [2020-12-22 07:10:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 21411 transitions. [2020-12-22 07:10:47,921 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 21411 transitions. Word has length 147 [2020-12-22 07:10:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:47,921 INFO L481 AbstractCegarLoop]: Abstraction has 15287 states and 21411 transitions. [2020-12-22 07:10:47,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 21411 transitions. [2020-12-22 07:10:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:47,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:47,926 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:47,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:10:47,926 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1089899641, now seen corresponding path program 1 times [2020-12-22 07:10:47,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:47,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649869894] [2020-12-22 07:10:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:48,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649869894] [2020-12-22 07:10:48,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:48,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:48,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871169147] [2020-12-22 07:10:48,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:48,002 INFO L87 Difference]: Start difference. First operand 15287 states and 21411 transitions. Second operand 5 states. [2020-12-22 07:10:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:50,051 INFO L93 Difference]: Finished difference Result 39630 states and 55813 transitions. [2020-12-22 07:10:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:50,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-12-22 07:10:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:50,075 INFO L225 Difference]: With dead ends: 39630 [2020-12-22 07:10:50,075 INFO L226 Difference]: Without dead ends: 24401 [2020-12-22 07:10:50,088 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 07:10:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24401 states. [2020-12-22 07:10:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24401 to 15476. [2020-12-22 07:10:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15476 states. [2020-12-22 07:10:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15476 states to 15476 states and 21489 transitions. [2020-12-22 07:10:51,476 INFO L78 Accepts]: Start accepts. Automaton has 15476 states and 21489 transitions. Word has length 151 [2020-12-22 07:10:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:51,477 INFO L481 AbstractCegarLoop]: Abstraction has 15476 states and 21489 transitions. [2020-12-22 07:10:51,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15476 states and 21489 transitions. [2020-12-22 07:10:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:51,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:51,480 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:51,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:10:51,481 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash 261485577, now seen corresponding path program 1 times [2020-12-22 07:10:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:51,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570125204] [2020-12-22 07:10:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:51,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570125204] [2020-12-22 07:10:51,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:51,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:51,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308087586] [2020-12-22 07:10:51,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:51,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:51,571 INFO L87 Difference]: Start difference. First operand 15476 states and 21489 transitions. Second operand 5 states. [2020-12-22 07:10:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:55,200 INFO L93 Difference]: Finished difference Result 55218 states and 77457 transitions. [2020-12-22 07:10:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:55,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-12-22 07:10:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:55,244 INFO L225 Difference]: With dead ends: 55218 [2020-12-22 07:10:55,244 INFO L226 Difference]: Without dead ends: 39807 [2020-12-22 07:10:55,258 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 07:10:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2020-12-22 07:10:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 15998. [2020-12-22 07:10:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15998 states. [2020-12-22 07:10:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15998 states to 15998 states and 22011 transitions. [2020-12-22 07:10:57,079 INFO L78 Accepts]: Start accepts. Automaton has 15998 states and 22011 transitions. Word has length 151 [2020-12-22 07:10:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,080 INFO L481 AbstractCegarLoop]: Abstraction has 15998 states and 22011 transitions. [2020-12-22 07:10:57,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 15998 states and 22011 transitions. [2020-12-22 07:10:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:57,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,084 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:57,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:10:57,084 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -509247989, now seen corresponding path program 1 times [2020-12-22 07:10:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526708941] [2020-12-22 07:10:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:57,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526708941] [2020-12-22 07:10:57,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:57,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:57,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984456918] [2020-12-22 07:10:57,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:57,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:57,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:57,150 INFO L87 Difference]: Start difference. First operand 15998 states and 22011 transitions. Second operand 4 states. [2020-12-22 07:11:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,639 INFO L93 Difference]: Finished difference Result 61163 states and 84084 transitions. [2020-12-22 07:11:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:01,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-12-22 07:11:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,688 INFO L225 Difference]: With dead ends: 61163 [2020-12-22 07:11:01,689 INFO L226 Difference]: Without dead ends: 45235 [2020-12-22 07:11:01,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45235 states. [2020-12-22 07:11:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45235 to 43893. [2020-12-22 07:11:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43893 states. [2020-12-22 07:11:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43893 states to 43893 states and 59956 transitions. [2020-12-22 07:11:05,841 INFO L78 Accepts]: Start accepts. Automaton has 43893 states and 59956 transitions. Word has length 151 [2020-12-22 07:11:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:05,841 INFO L481 AbstractCegarLoop]: Abstraction has 43893 states and 59956 transitions. [2020-12-22 07:11:05,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 43893 states and 59956 transitions. [2020-12-22 07:11:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:11:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:05,846 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:05,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:11:05,846 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1943830874, now seen corresponding path program 1 times [2020-12-22 07:11:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:05,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377602210] [2020-12-22 07:11:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:05,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377602210] [2020-12-22 07:11:05,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:05,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387265053] [2020-12-22 07:11:05,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:05,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:05,908 INFO L87 Difference]: Start difference. First operand 43893 states and 59956 transitions. Second operand 5 states. [2020-12-22 07:11:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,034 INFO L93 Difference]: Finished difference Result 111238 states and 152994 transitions. [2020-12-22 07:11:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:12,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 07:11:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:12,112 INFO L225 Difference]: With dead ends: 111238 [2020-12-22 07:11:12,112 INFO L226 Difference]: Without dead ends: 67419 [2020-12-22 07:11:12,144 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 07:11:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67419 states. [2020-12-22 07:11:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67419 to 44412. [2020-12-22 07:11:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44412 states. [2020-12-22 07:11:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44412 states to 44412 states and 60172 transitions. [2020-12-22 07:11:16,686 INFO L78 Accepts]: Start accepts. Automaton has 44412 states and 60172 transitions. Word has length 155 [2020-12-22 07:11:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:16,686 INFO L481 AbstractCegarLoop]: Abstraction has 44412 states and 60172 transitions. [2020-12-22 07:11:16,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44412 states and 60172 transitions. [2020-12-22 07:11:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:11:16,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:16,692 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:16,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:16,692 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860200, now seen corresponding path program 1 times [2020-12-22 07:11:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:16,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952634102] [2020-12-22 07:11:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:16,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952634102] [2020-12-22 07:11:16,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:16,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:16,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049221902] [2020-12-22 07:11:16,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:16,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:16,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:16,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:16,752 INFO L87 Difference]: Start difference. First operand 44412 states and 60172 transitions. Second operand 5 states. [2020-12-22 07:11:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:26,858 INFO L93 Difference]: Finished difference Result 151354 states and 207678 transitions. [2020-12-22 07:11:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:26,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 07:11:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:26,977 INFO L225 Difference]: With dead ends: 151354 [2020-12-22 07:11:26,978 INFO L226 Difference]: Without dead ends: 107023 [2020-12-22 07:11:27,014 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 07:11:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107023 states. [2020-12-22 07:11:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107023 to 45840. [2020-12-22 07:11:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45840 states. [2020-12-22 07:11:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45840 states to 45840 states and 61600 transitions. [2020-12-22 07:11:32,140 INFO L78 Accepts]: Start accepts. Automaton has 45840 states and 61600 transitions. Word has length 155 [2020-12-22 07:11:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:32,140 INFO L481 AbstractCegarLoop]: Abstraction has 45840 states and 61600 transitions. [2020-12-22 07:11:32,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45840 states and 61600 transitions. [2020-12-22 07:11:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:11:32,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:32,145 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:32,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:32,145 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash 707022122, now seen corresponding path program 1 times [2020-12-22 07:11:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:32,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963332063] [2020-12-22 07:11:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:32,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963332063] [2020-12-22 07:11:32,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:32,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:32,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974867530] [2020-12-22 07:11:32,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:32,332 INFO L87 Difference]: Start difference. First operand 45840 states and 61600 transitions. Second operand 4 states. [2020-12-22 07:11:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:45,164 INFO L93 Difference]: Finished difference Result 174615 states and 234623 transitions. [2020-12-22 07:11:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:45,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 07:11:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:45,320 INFO L225 Difference]: With dead ends: 174615 [2020-12-22 07:11:45,321 INFO L226 Difference]: Without dead ends: 128861 [2020-12-22 07:11:45,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128861 states. [2020-12-22 07:11:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128861 to 126151. [2020-12-22 07:11:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126151 states. [2020-12-22 07:11:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126151 states to 126151 states and 168537 transitions. [2020-12-22 07:11:58,907 INFO L78 Accepts]: Start accepts. Automaton has 126151 states and 168537 transitions. Word has length 155 [2020-12-22 07:11:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:58,907 INFO L481 AbstractCegarLoop]: Abstraction has 126151 states and 168537 transitions. [2020-12-22 07:11:58,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 126151 states and 168537 transitions. [2020-12-22 07:11:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 07:11:58,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:58,916 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:58,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:58,916 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash -522846779, now seen corresponding path program 1 times [2020-12-22 07:11:58,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:58,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821816186] [2020-12-22 07:11:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821816186] [2020-12-22 07:11:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:59,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:59,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056372911] [2020-12-22 07:11:59,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:59,032 INFO L87 Difference]: Start difference. First operand 126151 states and 168537 transitions. Second operand 5 states. [2020-12-22 07:12:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:18,996 INFO L93 Difference]: Finished difference Result 312838 states and 420937 transitions. [2020-12-22 07:12:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:18,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-12-22 07:12:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:19,286 INFO L225 Difference]: With dead ends: 312838 [2020-12-22 07:12:19,286 INFO L226 Difference]: Without dead ends: 186777 [2020-12-22 07:12:19,572 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 07:12:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186777 states. [2020-12-22 07:12:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186777 to 127576. [2020-12-22 07:12:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127576 states. [2020-12-22 07:12:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127576 states to 127576 states and 169135 transitions. [2020-12-22 07:12:34,974 INFO L78 Accepts]: Start accepts. Automaton has 127576 states and 169135 transitions. Word has length 159 [2020-12-22 07:12:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:34,975 INFO L481 AbstractCegarLoop]: Abstraction has 127576 states and 169135 transitions. [2020-12-22 07:12:34,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 127576 states and 169135 transitions. [2020-12-22 07:12:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 07:12:34,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:34,983 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:34,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:12:34,984 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:34,984 INFO L82 PathProgramCache]: Analyzing trace with hash -282607033, now seen corresponding path program 1 times [2020-12-22 07:12:34,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:34,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811883120] [2020-12-22 07:12:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:12:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811883120] [2020-12-22 07:12:35,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:35,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:35,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423782757] [2020-12-22 07:12:35,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:35,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:35,069 INFO L87 Difference]: Start difference. First operand 127576 states and 169135 transitions. Second operand 4 states.