/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:21,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:21,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:21,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:21,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:21,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:21,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:21,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:21,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:21,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:21,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:21,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:21,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:21,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:21,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:21,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:21,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:21,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:21,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:21,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:21,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:21,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:21,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:21,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:21,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:21,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:21,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:21,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:21,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:21,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:21,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:21,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:21,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:21,370 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:21,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:21,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:21,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:21,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:21,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:21,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:21,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:21,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:21,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:21,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:21,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:21,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:21,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:21,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:21,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:21,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:21,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:21,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:21,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:21,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:21,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:21,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:21,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:21,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:21,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:21,870 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:21,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:48:21,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ae302a/140b876aa9694d38a78891ee1ba1612b/FLAGe1bd89167 [2020-12-22 09:48:23,097 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:23,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:48:23,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ae302a/140b876aa9694d38a78891ee1ba1612b/FLAGe1bd89167 [2020-12-22 09:48:23,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a42ae302a/140b876aa9694d38a78891ee1ba1612b [2020-12-22 09:48:23,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:23,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:23,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:23,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:23,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:23,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:23" (1/1) ... [2020-12-22 09:48:23,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3848acd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:23, skipping insertion in model container [2020-12-22 09:48:23,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:23" (1/1) ... [2020-12-22 09:48:23,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:23,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:24,026 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c[8784,8797] [2020-12-22 09:48:24,064 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c[11358,11371] [2020-12-22 09:48:25,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:25,160 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:25,238 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c[8784,8797] [2020-12-22 09:48:25,246 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c[11358,11371] [2020-12-22 09:48:25,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:25,977 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:25,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25 WrapperNode [2020-12-22 09:48:25,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:25,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:25,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:25,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:25,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:26,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:26,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:26,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:26,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... [2020-12-22 09:48:26,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:26,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:26,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:26,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:26,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:27,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:48:33,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:48:33,277 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:48:33,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:33 BoogieIcfgContainer [2020-12-22 09:48:33,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:48:33,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:48:33,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:48:33,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:48:33,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:23" (1/3) ... [2020-12-22 09:48:33,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb3e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:33, skipping insertion in model container [2020-12-22 09:48:33,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:25" (2/3) ... [2020-12-22 09:48:33,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb3e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:33, skipping insertion in model container [2020-12-22 09:48:33,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:33" (3/3) ... [2020-12-22 09:48:33,296 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:48:33,304 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:48:33,311 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:48:33,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:48:33,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:48:33,379 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:48:33,379 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:48:33,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:48:33,379 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:48:33,379 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:48:33,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:48:33,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:48:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:48:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 09:48:33,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:33,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:33,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1460351157, now seen corresponding path program 1 times [2020-12-22 09:48:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:33,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147401115] [2020-12-22 09:48:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147401115] [2020-12-22 09:48:33,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:33,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:33,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751252458] [2020-12-22 09:48:33,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:33,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:33,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:33,878 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 3 states. [2020-12-22 09:48:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:40,420 INFO L93 Difference]: Finished difference Result 2512 states and 4836 transitions. [2020-12-22 09:48:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:40,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 09:48:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:40,462 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:48:40,462 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:40,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2901 transitions. [2020-12-22 09:48:40,643 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2901 transitions. Word has length 24 [2020-12-22 09:48:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:40,645 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2901 transitions. [2020-12-22 09:48:40,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2901 transitions. [2020-12-22 09:48:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:40,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:40,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:40,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:48:40,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:48:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54172944] [2020-12-22 09:48:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:40,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54172944] [2020-12-22 09:48:40,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:40,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513556895] [2020-12-22 09:48:40,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:40,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:40,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:40,752 INFO L87 Difference]: Start difference. First operand 1579 states and 2901 transitions. Second operand 5 states. [2020-12-22 09:48:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:40,851 INFO L93 Difference]: Finished difference Result 1628 states and 2976 transitions. [2020-12-22 09:48:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:48:40,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:48:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:40,862 INFO L225 Difference]: With dead ends: 1628 [2020-12-22 09:48:40,862 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:40,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:48:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2878 transitions. [2020-12-22 09:48:40,913 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2878 transitions. Word has length 30 [2020-12-22 09:48:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:40,913 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2878 transitions. [2020-12-22 09:48:40,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2878 transitions. [2020-12-22 09:48:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:48:40,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:40,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:40,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:48:40,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:48:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:40,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468237494] [2020-12-22 09:48:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:41,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468237494] [2020-12-22 09:48:41,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:41,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558956997] [2020-12-22 09:48:41,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:41,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:41,149 INFO L87 Difference]: Start difference. First operand 1579 states and 2878 transitions. Second operand 6 states. [2020-12-22 09:48:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:41,362 INFO L93 Difference]: Finished difference Result 1939 states and 3446 transitions. [2020-12-22 09:48:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:48:41,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:48:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:41,423 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 09:48:41,424 INFO L226 Difference]: Without dead ends: 1894 [2020-12-22 09:48:41,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:48:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-12-22 09:48:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1622. [2020-12-22 09:48:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-12-22 09:48:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2946 transitions. [2020-12-22 09:48:41,498 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2946 transitions. Word has length 52 [2020-12-22 09:48:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:41,499 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2946 transitions. [2020-12-22 09:48:41,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2946 transitions. [2020-12-22 09:48:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:41,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:41,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:41,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:48:41,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:48:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:41,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8085060] [2020-12-22 09:48:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:41,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8085060] [2020-12-22 09:48:41,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:41,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347985148] [2020-12-22 09:48:41,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:41,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:41,662 INFO L87 Difference]: Start difference. First operand 1622 states and 2946 transitions. Second operand 3 states. [2020-12-22 09:48:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:41,731 INFO L93 Difference]: Finished difference Result 1787 states and 3205 transitions. [2020-12-22 09:48:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:41,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:41,746 INFO L225 Difference]: With dead ends: 1787 [2020-12-22 09:48:41,746 INFO L226 Difference]: Without dead ends: 1699 [2020-12-22 09:48:41,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-12-22 09:48:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-12-22 09:48:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3058 transitions. [2020-12-22 09:48:41,809 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3058 transitions. Word has length 54 [2020-12-22 09:48:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:41,811 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3058 transitions. [2020-12-22 09:48:41,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3058 transitions. [2020-12-22 09:48:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:41,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:41,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:41,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:48:41,815 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:48:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:41,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287943270] [2020-12-22 09:48:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:42,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287943270] [2020-12-22 09:48:42,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:42,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:42,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680953556] [2020-12-22 09:48:42,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:42,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:42,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:42,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:42,061 INFO L87 Difference]: Start difference. First operand 1695 states and 3058 transitions. Second operand 6 states. [2020-12-22 09:48:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,253 INFO L93 Difference]: Finished difference Result 1858 states and 3310 transitions. [2020-12-22 09:48:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:42,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:48:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,265 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 09:48:42,266 INFO L226 Difference]: Without dead ends: 1697 [2020-12-22 09:48:42,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-12-22 09:48:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2020-12-22 09:48:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 3056 transitions. [2020-12-22 09:48:42,319 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 3056 transitions. Word has length 54 [2020-12-22 09:48:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:42,320 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 3056 transitions. [2020-12-22 09:48:42,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 3056 transitions. [2020-12-22 09:48:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:42,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:42,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:42,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:48:42,323 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:48:42,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:42,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697363389] [2020-12-22 09:48:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697363389] [2020-12-22 09:48:42,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:42,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:42,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63280125] [2020-12-22 09:48:42,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:42,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:42,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,433 INFO L87 Difference]: Start difference. First operand 1695 states and 3056 transitions. Second operand 3 states. [2020-12-22 09:48:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,485 INFO L93 Difference]: Finished difference Result 1993 states and 3514 transitions. [2020-12-22 09:48:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:42,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,500 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 09:48:42,500 INFO L226 Difference]: Without dead ends: 1832 [2020-12-22 09:48:42,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-12-22 09:48:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2020-12-22 09:48:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-12-22 09:48:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3260 transitions. [2020-12-22 09:48:42,561 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3260 transitions. Word has length 54 [2020-12-22 09:48:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:42,561 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 3260 transitions. [2020-12-22 09:48:42,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3260 transitions. [2020-12-22 09:48:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:42,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:42,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:42,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:48:42,565 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:48:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:42,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462525059] [2020-12-22 09:48:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:42,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462525059] [2020-12-22 09:48:42,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:42,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:42,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988674770] [2020-12-22 09:48:42,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,669 INFO L87 Difference]: Start difference. First operand 1830 states and 3260 transitions. Second operand 3 states. [2020-12-22 09:48:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,738 INFO L93 Difference]: Finished difference Result 2374 states and 4086 transitions. [2020-12-22 09:48:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:42,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,751 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 09:48:42,752 INFO L226 Difference]: Without dead ends: 2078 [2020-12-22 09:48:42,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-12-22 09:48:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2020-12-22 09:48:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-22 09:48:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3624 transitions. [2020-12-22 09:48:42,830 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3624 transitions. Word has length 54 [2020-12-22 09:48:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:42,831 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3624 transitions. [2020-12-22 09:48:42,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3624 transitions. [2020-12-22 09:48:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:42,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:42,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:42,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:48:42,833 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:48:42,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:42,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376220328] [2020-12-22 09:48:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376220328] [2020-12-22 09:48:42,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:42,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:42,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431783693] [2020-12-22 09:48:42,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:42,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:42,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,881 INFO L87 Difference]: Start difference. First operand 2076 states and 3624 transitions. Second operand 3 states. [2020-12-22 09:48:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,968 INFO L93 Difference]: Finished difference Result 3064 states and 5098 transitions. [2020-12-22 09:48:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:42,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,984 INFO L225 Difference]: With dead ends: 3064 [2020-12-22 09:48:42,984 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:48:42,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:48:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2020-12-22 09:48:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-12-22 09:48:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 4264 transitions. [2020-12-22 09:48:43,090 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 4264 transitions. Word has length 54 [2020-12-22 09:48:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,091 INFO L481 AbstractCegarLoop]: Abstraction has 2520 states and 4264 transitions. [2020-12-22 09:48:43,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 4264 transitions. [2020-12-22 09:48:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:48:43,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:43,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:48:43,093 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:48:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062922886] [2020-12-22 09:48:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:43,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062922886] [2020-12-22 09:48:43,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:43,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038523731] [2020-12-22 09:48:43,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:43,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:43,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:43,210 INFO L87 Difference]: Start difference. First operand 2520 states and 4264 transitions. Second operand 5 states. [2020-12-22 09:48:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,423 INFO L93 Difference]: Finished difference Result 3274 states and 5349 transitions. [2020-12-22 09:48:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:48:43,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:48:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,446 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 09:48:43,446 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 09:48:43,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 09:48:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2568. [2020-12-22 09:48:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-12-22 09:48:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4304 transitions. [2020-12-22 09:48:43,599 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4304 transitions. Word has length 55 [2020-12-22 09:48:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,599 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 4304 transitions. [2020-12-22 09:48:43,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4304 transitions. [2020-12-22 09:48:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:48:43,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,600 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] [2020-12-22 09:48:43,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:48:43,601 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:48:43,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458932802] [2020-12-22 09:48:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:43,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458932802] [2020-12-22 09:48:43,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:43,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222193303] [2020-12-22 09:48:43,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,723 INFO L87 Difference]: Start difference. First operand 2568 states and 4304 transitions. Second operand 3 states. [2020-12-22 09:48:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,862 INFO L93 Difference]: Finished difference Result 3631 states and 5862 transitions. [2020-12-22 09:48:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:43,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:48:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,881 INFO L225 Difference]: With dead ends: 3631 [2020-12-22 09:48:43,881 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 09:48:43,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 09:48:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-12-22 09:48:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:48:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4962 transitions. [2020-12-22 09:48:44,042 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4962 transitions. Word has length 56 [2020-12-22 09:48:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:44,043 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4962 transitions. [2020-12-22 09:48:44,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4962 transitions. [2020-12-22 09:48:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:44,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:44,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:48:44,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:48:44,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083552987] [2020-12-22 09:48:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:48:44,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083552987] [2020-12-22 09:48:44,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:44,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:44,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440516999] [2020-12-22 09:48:44,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:44,152 INFO L87 Difference]: Start difference. First operand 3034 states and 4962 transitions. Second operand 6 states. [2020-12-22 09:48:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:44,712 INFO L93 Difference]: Finished difference Result 9340 states and 14003 transitions. [2020-12-22 09:48:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:44,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:44,764 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:48:44,764 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:48:44,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:48:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:48:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:48:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 7090 transitions. [2020-12-22 09:48:45,091 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 7090 transitions. Word has length 78 [2020-12-22 09:48:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:45,091 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 7090 transitions. [2020-12-22 09:48:45,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 7090 transitions. [2020-12-22 09:48:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:45,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:45,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:45,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:48:45,102 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:48:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:45,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695029636] [2020-12-22 09:48:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:48:45,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695029636] [2020-12-22 09:48:45,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:45,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799121845] [2020-12-22 09:48:45,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:45,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:45,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:45,242 INFO L87 Difference]: Start difference. First operand 4530 states and 7090 transitions. Second operand 6 states. [2020-12-22 09:48:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:46,039 INFO L93 Difference]: Finished difference Result 10836 states and 16131 transitions. [2020-12-22 09:48:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:46,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:46,067 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:48:46,067 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:48:46,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:48:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:48:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:48:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10262 transitions. [2020-12-22 09:48:46,597 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10262 transitions. Word has length 78 [2020-12-22 09:48:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:46,597 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10262 transitions. [2020-12-22 09:48:46,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10262 transitions. [2020-12-22 09:48:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:46,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:46,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:46,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:48:46,601 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:48:46,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:46,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659894299] [2020-12-22 09:48:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:48:46,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659894299] [2020-12-22 09:48:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441125074] [2020-12-22 09:48:46,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:46,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:46,724 INFO L87 Difference]: Start difference. First operand 6778 states and 10262 transitions. Second operand 6 states. [2020-12-22 09:48:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:47,537 INFO L93 Difference]: Finished difference Result 12332 states and 18259 transitions. [2020-12-22 09:48:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:47,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:47,563 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:48:47,564 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:48:47,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:48:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:48:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:48:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12390 transitions. [2020-12-22 09:48:48,172 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12390 transitions. Word has length 78 [2020-12-22 09:48:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:48,173 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12390 transitions. [2020-12-22 09:48:48,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12390 transitions. [2020-12-22 09:48:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:48,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:48,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:48,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:48:48,178 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:48:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:48,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890957555] [2020-12-22 09:48:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890957555] [2020-12-22 09:48:48,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:48,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:48,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817020582] [2020-12-22 09:48:48,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:48,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:48,259 INFO L87 Difference]: Start difference. First operand 8274 states and 12390 transitions. Second operand 3 states. [2020-12-22 09:48:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:48,750 INFO L93 Difference]: Finished difference Result 13055 states and 19262 transitions. [2020-12-22 09:48:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:48,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:48:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:48,764 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:48:48,764 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:48:48,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:48:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:48:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:48:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9607 transitions. [2020-12-22 09:48:49,150 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9607 transitions. Word has length 80 [2020-12-22 09:48:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:49,151 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9607 transitions. [2020-12-22 09:48:49,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9607 transitions. [2020-12-22 09:48:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:49,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:49,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:49,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:48:49,154 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:48:49,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:49,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759976541] [2020-12-22 09:48:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:49,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759976541] [2020-12-22 09:48:49,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:49,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:49,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591548985] [2020-12-22 09:48:49,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:49,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:49,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:49,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:49,256 INFO L87 Difference]: Start difference. First operand 6315 states and 9607 transitions. Second operand 6 states. [2020-12-22 09:48:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:49,878 INFO L93 Difference]: Finished difference Result 10549 states and 15692 transitions. [2020-12-22 09:48:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:49,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:48:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:49,900 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:48:49,901 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:48:49,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:48:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:48:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:48:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 11111 transitions. [2020-12-22 09:48:50,479 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 11111 transitions. Word has length 80 [2020-12-22 09:48:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:50,480 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 11111 transitions. [2020-12-22 09:48:50,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 11111 transitions. [2020-12-22 09:48:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:50,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:50,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:50,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:48:50,483 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:48:50,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:50,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640870383] [2020-12-22 09:48:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640870383] [2020-12-22 09:48:50,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:50,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025240733] [2020-12-22 09:48:50,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:50,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:50,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:50,548 INFO L87 Difference]: Start difference. First operand 7371 states and 11111 transitions. Second operand 3 states. [2020-12-22 09:48:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:50,788 INFO L93 Difference]: Finished difference Result 10279 states and 15249 transitions. [2020-12-22 09:48:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:50,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:50,801 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:48:50,801 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:48:50,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:48:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:48:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:48:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6931 transitions. [2020-12-22 09:48:51,082 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6931 transitions. Word has length 81 [2020-12-22 09:48:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,082 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6931 transitions. [2020-12-22 09:48:51,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6931 transitions. [2020-12-22 09:48:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:51,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:48:51,086 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:48:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170383738] [2020-12-22 09:48:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170383738] [2020-12-22 09:48:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:51,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695621992] [2020-12-22 09:48:51,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:51,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,147 INFO L87 Difference]: Start difference. First operand 4467 states and 6931 transitions. Second operand 3 states. [2020-12-22 09:48:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:51,290 INFO L93 Difference]: Finished difference Result 5923 states and 8979 transitions. [2020-12-22 09:48:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:51,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:51,298 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:48:51,299 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:48:51,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:48:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:48:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:48:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4863 transitions. [2020-12-22 09:48:51,438 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4863 transitions. Word has length 81 [2020-12-22 09:48:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,438 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4863 transitions. [2020-12-22 09:48:51,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4863 transitions. [2020-12-22 09:48:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:51,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:48:51,440 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:48:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750906773] [2020-12-22 09:48:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750906773] [2020-12-22 09:48:51,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:51,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:51,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656503310] [2020-12-22 09:48:51,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:51,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,497 INFO L87 Difference]: Start difference. First operand 3015 states and 4863 transitions. Second operand 3 states. [2020-12-22 09:48:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:51,576 INFO L93 Difference]: Finished difference Result 3745 states and 5877 transitions. [2020-12-22 09:48:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:51,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:51,582 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:48:51,582 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:48:51,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:48:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:48:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:48:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3840 transitions. [2020-12-22 09:48:51,660 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3840 transitions. Word has length 81 [2020-12-22 09:48:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,660 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3840 transitions. [2020-12-22 09:48:51,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3840 transitions. [2020-12-22 09:48:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:48:51,662 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:48:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575620788] [2020-12-22 09:48:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575620788] [2020-12-22 09:48:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654080710] [2020-12-22 09:48:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:48:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:52,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:52,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:48:52,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691339095] [2020-12-22 09:48:52,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:48:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:48:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:48:52,474 INFO L87 Difference]: Start difference. First operand 2289 states and 3840 transitions. Second operand 12 states. [2020-12-22 09:48:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:54,194 INFO L93 Difference]: Finished difference Result 5722 states and 8489 transitions. [2020-12-22 09:48:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:48:54,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:48:54,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:54,208 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:48:54,208 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:48:54,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:48:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:48:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:48:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:48:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 6129 transitions. [2020-12-22 09:48:54,572 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 6129 transitions. Word has length 81 [2020-12-22 09:48:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:54,572 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 6129 transitions. [2020-12-22 09:48:54,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:48:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 6129 transitions. [2020-12-22 09:48:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:54,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:54,574 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:54,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:54,789 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:48:54,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:54,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033833356] [2020-12-22 09:48:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:55,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033833356] [2020-12-22 09:48:55,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807257228] [2020-12-22 09:48:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:55,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:48:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:55,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:55,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:55,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:55,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465508961] [2020-12-22 09:48:55,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:55,919 INFO L87 Difference]: Start difference. First operand 4081 states and 6129 transitions. Second operand 17 states. [2020-12-22 09:48:56,055 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:48:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:59,366 INFO L93 Difference]: Finished difference Result 14199 states and 19285 transitions. [2020-12-22 09:48:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:59,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:48:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:59,393 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:48:59,393 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:48:59,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:48:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:49:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:49:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:49:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 11311 transitions. [2020-12-22 09:49:00,189 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 11311 transitions. Word has length 82 [2020-12-22 09:49:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:00,190 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 11311 transitions. [2020-12-22 09:49:00,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 11311 transitions. [2020-12-22 09:49:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:00,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:00,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:00,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:00,407 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:49:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:00,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678238158] [2020-12-22 09:49:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678238158] [2020-12-22 09:49:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951362022] [2020-12-22 09:49:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:01,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:01,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:01,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972195099] [2020-12-22 09:49:01,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:01,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:01,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:01,411 INFO L87 Difference]: Start difference. First operand 8112 states and 11311 transitions. Second operand 17 states. [2020-12-22 09:49:01,951 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-12-22 09:49:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:05,368 INFO L93 Difference]: Finished difference Result 32062 states and 42534 transitions. [2020-12-22 09:49:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:05,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:05,410 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:49:05,410 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:49:05,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:49:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:49:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:49:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 25045 transitions. [2020-12-22 09:49:07,166 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 25045 transitions. Word has length 82 [2020-12-22 09:49:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:07,166 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 25045 transitions. [2020-12-22 09:49:07,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 25045 transitions. [2020-12-22 09:49:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:07,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:07,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:07,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:07,385 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:07,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:07,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321430218] [2020-12-22 09:49:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:07,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321430218] [2020-12-22 09:49:07,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624079850] [2020-12-22 09:49:07,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:07,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:07,468 INFO L87 Difference]: Start difference. First operand 18920 states and 25045 transitions. Second operand 6 states. [2020-12-22 09:49:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:08,806 INFO L93 Difference]: Finished difference Result 33364 states and 43645 transitions. [2020-12-22 09:49:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:08,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:08,836 INFO L225 Difference]: With dead ends: 33364 [2020-12-22 09:49:08,836 INFO L226 Difference]: Without dead ends: 16077 [2020-12-22 09:49:08,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2020-12-22 09:49:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 16077. [2020-12-22 09:49:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-12-22 09:49:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 21161 transitions. [2020-12-22 09:49:10,257 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 21161 transitions. Word has length 82 [2020-12-22 09:49:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:10,257 INFO L481 AbstractCegarLoop]: Abstraction has 16077 states and 21161 transitions. [2020-12-22 09:49:10,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 21161 transitions. [2020-12-22 09:49:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:10,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:10,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:10,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:49:10,260 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664390688] [2020-12-22 09:49:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:10,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664390688] [2020-12-22 09:49:10,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:10,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:10,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369732250] [2020-12-22 09:49:10,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:10,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:10,336 INFO L87 Difference]: Start difference. First operand 16077 states and 21161 transitions. Second operand 6 states. [2020-12-22 09:49:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,463 INFO L93 Difference]: Finished difference Result 26822 states and 34826 transitions. [2020-12-22 09:49:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:11,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,485 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 09:49:11,485 INFO L226 Difference]: Without dead ends: 12404 [2020-12-22 09:49:11,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-12-22 09:49:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12404. [2020-12-22 09:49:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12404 states. [2020-12-22 09:49:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12404 states to 12404 states and 16383 transitions. [2020-12-22 09:49:12,840 INFO L78 Accepts]: Start accepts. Automaton has 12404 states and 16383 transitions. Word has length 82 [2020-12-22 09:49:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,841 INFO L481 AbstractCegarLoop]: Abstraction has 12404 states and 16383 transitions. [2020-12-22 09:49:12,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 12404 states and 16383 transitions. [2020-12-22 09:49:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:12,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:12,843 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:12,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126756739] [2020-12-22 09:49:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:12,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126756739] [2020-12-22 09:49:12,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:12,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077087198] [2020-12-22 09:49:12,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:12,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:12,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:12,934 INFO L87 Difference]: Start difference. First operand 12404 states and 16383 transitions. Second operand 6 states. [2020-12-22 09:49:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,940 INFO L93 Difference]: Finished difference Result 20759 states and 26944 transitions. [2020-12-22 09:49:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:13,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,951 INFO L225 Difference]: With dead ends: 20759 [2020-12-22 09:49:13,951 INFO L226 Difference]: Without dead ends: 9932 [2020-12-22 09:49:13,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2020-12-22 09:49:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 9932. [2020-12-22 09:49:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2020-12-22 09:49:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 13264 transitions. [2020-12-22 09:49:14,884 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 13264 transitions. Word has length 82 [2020-12-22 09:49:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,884 INFO L481 AbstractCegarLoop]: Abstraction has 9932 states and 13264 transitions. [2020-12-22 09:49:14,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 13264 transitions. [2020-12-22 09:49:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:14,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:14,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:14,886 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141506234] [2020-12-22 09:49:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141506234] [2020-12-22 09:49:15,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448901999] [2020-12-22 09:49:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:15,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:15,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:15,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925682071] [2020-12-22 09:49:15,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:15,853 INFO L87 Difference]: Start difference. First operand 9932 states and 13264 transitions. Second operand 17 states. [2020-12-22 09:49:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:21,018 INFO L93 Difference]: Finished difference Result 42734 states and 53704 transitions. [2020-12-22 09:49:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:21,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:21,054 INFO L225 Difference]: With dead ends: 42734 [2020-12-22 09:49:21,054 INFO L226 Difference]: Without dead ends: 35713 [2020-12-22 09:49:21,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35713 states. [2020-12-22 09:49:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35713 to 22851. [2020-12-22 09:49:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22851 states. [2020-12-22 09:49:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 29313 transitions. [2020-12-22 09:49:23,495 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 29313 transitions. Word has length 83 [2020-12-22 09:49:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,495 INFO L481 AbstractCegarLoop]: Abstraction has 22851 states and 29313 transitions. [2020-12-22 09:49:23,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 29313 transitions. [2020-12-22 09:49:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:23,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:23,699 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:23,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608581153] [2020-12-22 09:49:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:49:23,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608581153] [2020-12-22 09:49:23,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:23,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:23,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326536931] [2020-12-22 09:49:23,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:23,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:23,790 INFO L87 Difference]: Start difference. First operand 22851 states and 29313 transitions. Second operand 6 states. [2020-12-22 09:49:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:25,893 INFO L93 Difference]: Finished difference Result 38944 states and 49269 transitions. [2020-12-22 09:49:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:25,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:25,915 INFO L225 Difference]: With dead ends: 38944 [2020-12-22 09:49:25,915 INFO L226 Difference]: Without dead ends: 17826 [2020-12-22 09:49:25,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-12-22 09:49:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17826. [2020-12-22 09:49:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17826 states. [2020-12-22 09:49:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 22710 transitions. [2020-12-22 09:49:27,763 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 22710 transitions. Word has length 83 [2020-12-22 09:49:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:27,763 INFO L481 AbstractCegarLoop]: Abstraction has 17826 states and 22710 transitions. [2020-12-22 09:49:27,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 22710 transitions. [2020-12-22 09:49:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:27,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:27,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:27,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:49:27,766 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:27,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:27,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080766721] [2020-12-22 09:49:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080766721] [2020-12-22 09:49:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985289896] [2020-12-22 09:49:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:29,996 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-22 09:49:30,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:30,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:30,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:49:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626036577] [2020-12-22 09:49:30,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:49:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:49:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:49:30,934 INFO L87 Difference]: Start difference. First operand 17826 states and 22710 transitions. Second operand 40 states. [2020-12-22 09:49:31,346 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:49:32,520 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-22 09:49:32,816 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:49:33,063 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:49:33,386 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:49:33,760 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:49:34,262 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:49:34,734 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:49:35,254 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:49:35,728 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:49:36,064 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:36,383 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:36,624 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:36,943 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:37,198 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:37,537 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:37,785 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:38,265 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:49:38,536 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:49:39,042 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:49:39,499 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:49:39,858 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:40,630 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:49:40,870 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:41,120 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:41,470 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:41,941 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:42,174 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:42,359 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:42,807 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:43,016 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:43,625 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:43,981 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:44,181 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:45,343 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:46,573 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:49:46,907 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:49:47,170 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:47,694 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:47,957 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:49:48,295 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:49:48,525 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:48,752 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:48,922 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:49,113 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:49:49,318 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:49,657 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:49:49,843 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:49:50,244 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:49:50,527 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:49:50,870 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:51,062 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:51,296 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:49:51,567 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:49:51,796 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:52,458 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:49:52,670 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:52,983 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:53,852 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:54,070 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:56,992 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:49:57,319 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:49:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:58,400 INFO L93 Difference]: Finished difference Result 30408 states and 38540 transitions. [2020-12-22 09:49:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:49:58,401 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:49:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:58,428 INFO L225 Difference]: With dead ends: 30408 [2020-12-22 09:49:58,428 INFO L226 Difference]: Without dead ends: 24257 [2020-12-22 09:49:58,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:49:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2020-12-22 09:50:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 16024. [2020-12-22 09:50:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16024 states. [2020-12-22 09:50:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 20571 transitions. [2020-12-22 09:50:00,233 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 20571 transitions. Word has length 84 [2020-12-22 09:50:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:00,233 INFO L481 AbstractCegarLoop]: Abstraction has 16024 states and 20571 transitions. [2020-12-22 09:50:00,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:50:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 20571 transitions. [2020-12-22 09:50:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:00,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:00,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:00,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:50:00,451 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:50:00,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:00,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986901066] [2020-12-22 09:50:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:00,825 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:01,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986901066] [2020-12-22 09:50:01,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139836699] [2020-12-22 09:50:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:50:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:01,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:01,966 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:50:02,607 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:50:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:02,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:02,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:50:02,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907705758] [2020-12-22 09:50:02,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:50:02,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:50:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:50:02,678 INFO L87 Difference]: Start difference. First operand 16024 states and 20571 transitions. Second operand 23 states. [2020-12-22 09:50:02,844 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:03,392 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:03,716 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:03,977 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:50:04,462 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:50:04,746 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:50:05,062 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:50:05,648 WARN L197 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:06,212 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:06,823 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:07,239 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:07,756 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:08,189 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:08,724 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:08,975 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:09,349 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:09,667 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:10,150 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:10,425 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:50:10,865 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:11,143 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:11,829 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:12,748 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:50:13,001 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:13,322 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:50:13,694 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:50:14,385 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:50:14,825 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:50:15,491 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:15,814 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:50:16,030 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:16,700 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:17,099 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:17,418 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:17,656 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:18,033 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:18,470 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:18,699 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:19,002 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:19,413 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:19,767 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:20,090 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:50:20,445 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:20,751 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:50:21,063 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:50:21,943 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:50:22,409 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:50:22,798 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:50:23,210 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:50:23,703 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:50:24,386 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:50:25,006 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:50:25,295 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:50:25,905 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:50:26,258 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:50:26,704 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:28,408 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:50:29,083 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:50:29,362 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:50:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:30,823 INFO L93 Difference]: Finished difference Result 30140 states and 38696 transitions. [2020-12-22 09:50:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:50:30,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:50:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:30,845 INFO L225 Difference]: With dead ends: 30140 [2020-12-22 09:50:30,845 INFO L226 Difference]: Without dead ends: 21459 [2020-12-22 09:50:30,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:50:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2020-12-22 09:50:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 11771. [2020-12-22 09:50:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11771 states. [2020-12-22 09:50:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 15429 transitions. [2020-12-22 09:50:32,343 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 15429 transitions. Word has length 84 [2020-12-22 09:50:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:32,343 INFO L481 AbstractCegarLoop]: Abstraction has 11771 states and 15429 transitions. [2020-12-22 09:50:32,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:50:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 15429 transitions. [2020-12-22 09:50:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:50:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:32,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:32,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:32,559 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:50:32,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:32,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282837653] [2020-12-22 09:50:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:32,950 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-12-22 09:50:33,168 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:50:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:33,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282837653] [2020-12-22 09:50:33,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877165089] [2020-12-22 09:50:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:50:33,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:34,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:34,437 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:50:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:35,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:35,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:50:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997724673] [2020-12-22 09:50:35,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:50:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:50:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:50:35,024 INFO L87 Difference]: Start difference. First operand 11771 states and 15429 transitions. Second operand 24 states. [2020-12-22 09:50:35,656 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:50:35,974 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:36,295 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:36,643 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:50:36,885 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:50:37,286 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:50:37,858 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:50:38,568 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:50:39,412 WARN L197 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:50:39,733 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:50:40,332 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:50:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:42,671 INFO L93 Difference]: Finished difference Result 18601 states and 23689 transitions. [2020-12-22 09:50:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:50:42,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:50:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:42,687 INFO L225 Difference]: With dead ends: 18601 [2020-12-22 09:50:42,687 INFO L226 Difference]: Without dead ends: 13706 [2020-12-22 09:50:42,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:50:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-12-22 09:50:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 9679. [2020-12-22 09:50:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9679 states. [2020-12-22 09:50:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 12898 transitions. [2020-12-22 09:50:43,958 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 12898 transitions. Word has length 86 [2020-12-22 09:50:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:43,958 INFO L481 AbstractCegarLoop]: Abstraction has 9679 states and 12898 transitions. [2020-12-22 09:50:43,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:50:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 12898 transitions. [2020-12-22 09:50:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 09:50:43,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:43,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:44,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:50:44,175 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash 705002422, now seen corresponding path program 1 times [2020-12-22 09:50:44,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:44,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873596491] [2020-12-22 09:50:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:44,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873596491] [2020-12-22 09:50:44,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:44,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:44,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962597452] [2020-12-22 09:50:44,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:44,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:44,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:44,258 INFO L87 Difference]: Start difference. First operand 9679 states and 12898 transitions. Second operand 3 states. [2020-12-22 09:50:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:58,230 INFO L93 Difference]: Finished difference Result 12685 states and 18449 transitions. [2020-12-22 09:50:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:58,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 09:50:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:58,252 INFO L225 Difference]: With dead ends: 12685 [2020-12-22 09:50:58,252 INFO L226 Difference]: Without dead ends: 11181 [2020-12-22 09:50:58,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-12-22 09:50:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 11181. [2020-12-22 09:50:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2020-12-22 09:50:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 14820 transitions. [2020-12-22 09:50:59,672 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 14820 transitions. Word has length 93 [2020-12-22 09:50:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:59,672 INFO L481 AbstractCegarLoop]: Abstraction has 11181 states and 14820 transitions. [2020-12-22 09:50:59,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 14820 transitions. [2020-12-22 09:50:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 09:50:59,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:59,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:59,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 09:50:59,675 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:59,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1981553334, now seen corresponding path program 1 times [2020-12-22 09:50:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:59,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689541047] [2020-12-22 09:50:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689541047] [2020-12-22 09:50:59,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:59,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044448278] [2020-12-22 09:50:59,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:59,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:59,774 INFO L87 Difference]: Start difference. First operand 11181 states and 14820 transitions. Second operand 3 states. [2020-12-22 09:51:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:15,130 INFO L93 Difference]: Finished difference Result 17193 states and 24216 transitions. [2020-12-22 09:51:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:15,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 09:51:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:15,148 INFO L225 Difference]: With dead ends: 17193 [2020-12-22 09:51:15,148 INFO L226 Difference]: Without dead ends: 14187 [2020-12-22 09:51:15,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14187 states. [2020-12-22 09:51:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14187 to 13434. [2020-12-22 09:51:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13434 states. [2020-12-22 09:51:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 17890 transitions. [2020-12-22 09:51:16,476 INFO L78 Accepts]: Start accepts. Automaton has 13434 states and 17890 transitions. Word has length 101 [2020-12-22 09:51:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:16,476 INFO L481 AbstractCegarLoop]: Abstraction has 13434 states and 17890 transitions. [2020-12-22 09:51:16,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13434 states and 17890 transitions. [2020-12-22 09:51:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 09:51:16,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:16,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:16,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:51:16,480 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:16,481 INFO L82 PathProgramCache]: Analyzing trace with hash -569521892, now seen corresponding path program 1 times [2020-12-22 09:51:16,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:16,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879396527] [2020-12-22 09:51:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879396527] [2020-12-22 09:51:16,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:16,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411815016] [2020-12-22 09:51:16,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:51:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:51:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:51:16,646 INFO L87 Difference]: Start difference. First operand 13434 states and 17890 transitions. Second operand 4 states. [2020-12-22 09:51:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:36,870 INFO L93 Difference]: Finished difference Result 24701 states and 34296 transitions. [2020-12-22 09:51:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:51:36,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-12-22 09:51:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:36,904 INFO L225 Difference]: With dead ends: 24701 [2020-12-22 09:51:36,904 INFO L226 Difference]: Without dead ends: 19442 [2020-12-22 09:51:36,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:51:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2020-12-22 09:51:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 19442. [2020-12-22 09:51:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19442 states. [2020-12-22 09:51:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19442 states to 19442 states and 26150 transitions. [2020-12-22 09:51:38,315 INFO L78 Accepts]: Start accepts. Automaton has 19442 states and 26150 transitions. Word has length 128 [2020-12-22 09:51:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:38,316 INFO L481 AbstractCegarLoop]: Abstraction has 19442 states and 26150 transitions. [2020-12-22 09:51:38,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:51:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 19442 states and 26150 transitions. [2020-12-22 09:51:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:51:38,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:38,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:38,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:51:38,322 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:38,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:51:38,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:38,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754196961] [2020-12-22 09:51:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:38,841 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:51:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:38,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754196961] [2020-12-22 09:51:38,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665999258] [2020-12-22 09:51:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:51:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:51:39,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:39,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:51:39,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267358316] [2020-12-22 09:51:39,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:51:39,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:51:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:51:39,688 INFO L87 Difference]: Start difference. First operand 19442 states and 26150 transitions. Second operand 15 states. [2020-12-22 09:51:39,844 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:51:40,470 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:51:40,783 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:40,966 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:41,472 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:41,871 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:42,358 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:42,654 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:42,867 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:43,188 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:43,383 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:43,606 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:44,466 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:45,132 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:45,376 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:45,628 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:46,044 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:46,271 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:51:46,461 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:47,107 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:47,778 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:51:47,988 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:48,194 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:48,817 INFO L93 Difference]: Finished difference Result 31323 states and 40816 transitions. [2020-12-22 09:51:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:51:48,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:51:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:48,856 INFO L225 Difference]: With dead ends: 31323 [2020-12-22 09:51:48,857 INFO L226 Difference]: Without dead ends: 23869 [2020-12-22 09:51:48,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:51:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23869 states. [2020-12-22 09:51:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23869 to 23753. [2020-12-22 09:51:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23753 states. [2020-12-22 09:51:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23753 states to 23753 states and 30871 transitions. [2020-12-22 09:51:51,218 INFO L78 Accepts]: Start accepts. Automaton has 23753 states and 30871 transitions. Word has length 135 [2020-12-22 09:51:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:51,219 INFO L481 AbstractCegarLoop]: Abstraction has 23753 states and 30871 transitions. [2020-12-22 09:51:51,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:51:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 23753 states and 30871 transitions. [2020-12-22 09:51:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:51:51,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:51,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:51,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 09:51:51,423 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:51:51,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:51,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642889894] [2020-12-22 09:51:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:51,895 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-12-22 09:51:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642889894] [2020-12-22 09:51:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717694049] [2020-12-22 09:51:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:51:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:52,638 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:51:53,380 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:51:53,467 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:53,729 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:54,250 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:55,160 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:56,495 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:57,690 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:59,178 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:00,338 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:00,767 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:01,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:52:03,023 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 212