/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/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:24:13,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:24:13,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:24:13,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:24:13,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:24:13,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:24:13,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:24:13,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:24:13,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:24:13,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:24:13,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:24:13,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:24:13,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:24:13,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:24:13,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:24:13,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:24:13,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:24:13,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:24:13,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:24:13,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:24:13,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:24:13,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:24:13,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:24:13,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:24:13,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:24:13,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:24:13,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:24:13,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:24:13,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:24:14,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:24:14,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:24:14,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:24:14,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:24:14,049 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:24:14,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:24:14,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:24:14,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:24:14,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:24:14,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:24:14,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:24:14,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:24:14,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:24:14,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:24:14,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:24:14,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:24:14,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:24:14,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:24:14,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:24:14,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:24:14,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:24:14,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:24:14,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:24:14,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:24:14,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:24:14,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:24:14,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:24:14,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:24:14,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:24:14,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:24:14,546 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:24:14,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2020-12-22 04:24:14,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cde13f2/ab71144877bc4cdbabc13ac25cb0466e/FLAG352058f64 [2020-12-22 04:24:15,275 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:24:15,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2020-12-22 04:24:15,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cde13f2/ab71144877bc4cdbabc13ac25cb0466e/FLAG352058f64 [2020-12-22 04:24:15,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17cde13f2/ab71144877bc4cdbabc13ac25cb0466e [2020-12-22 04:24:15,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:24:15,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:24:15,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:24:15,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:24:15,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:24:15,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e29808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15, skipping insertion in model container [2020-12-22 04:24:15,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:24:15,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:24:15,826 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/loop-acceleration/diamond_1-2.c[373,386] [2020-12-22 04:24:15,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:24:15,852 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:24:15,866 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/loop-acceleration/diamond_1-2.c[373,386] [2020-12-22 04:24:15,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:24:15,888 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:24:15,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15 WrapperNode [2020-12-22 04:24:15,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:24:15,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:24:15,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:24:15,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:24:15,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:24:15,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:24:15,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:24:15,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:24:15,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (1/1) ... [2020-12-22 04:24:15,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:24:15,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:24:15,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:24:15,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:24:15,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (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 04:24:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:24:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:24:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:24:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:24:16,301 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:24:16,301 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:24:16,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:24:16 BoogieIcfgContainer [2020-12-22 04:24:16,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:24:16,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:24:16,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:24:16,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:24:16,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:24:15" (1/3) ... [2020-12-22 04:24:16,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8161f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:24:16, skipping insertion in model container [2020-12-22 04:24:16,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:24:15" (2/3) ... [2020-12-22 04:24:16,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8161f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:24:16, skipping insertion in model container [2020-12-22 04:24:16,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:24:16" (3/3) ... [2020-12-22 04:24:16,316 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-12-22 04:24:16,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:24:16,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:24:16,364 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:24:16,396 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:24:16,397 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:24:16,397 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:24:16,397 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:24:16,397 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:24:16,397 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:24:16,398 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:24:16,398 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:24:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:24:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:24:16,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:16,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:24:16,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:24:16,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:16,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461242085] [2020-12-22 04:24:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:16,608 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 04:24:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461242085] [2020-12-22 04:24:16,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:24:16,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:24:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307035640] [2020-12-22 04:24:16,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:24:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:24:16,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:24:16,636 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:24:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:16,654 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:24:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:24:16,656 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:24:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:16,666 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:24:16,666 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:24:16,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:24:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:24:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:24:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:24:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:24:16,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:24:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:16,710 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:24:16,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:24:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:24:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:24:16,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:16,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:24:16,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:24:16,712 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:24:16,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:16,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832412608] [2020-12-22 04:24:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:16,810 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 04:24:16,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832412608] [2020-12-22 04:24:16,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:24:16,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:24:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100052114] [2020-12-22 04:24:16,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:24:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:24:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:24:16,815 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:24:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:16,836 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-12-22 04:24:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:24:16,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:24:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:16,839 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:24:16,840 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:24:16,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 04:24:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:24:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:24:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:24:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-22 04:24:16,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-22 04:24:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:16,846 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-22 04:24:16,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:24:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-22 04:24:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:24:16,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:16,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:16,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:24:16,848 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2020-12-22 04:24:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:16,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45321013] [2020-12-22 04:24:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:17,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45321013] [2020-12-22 04:24:17,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285252024] [2020-12-22 04:24:17,013 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 04:24:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:17,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:24:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:17,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:17,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:24:17,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863546824] [2020-12-22 04:24:17,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:24:17,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:24:17,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:24:17,173 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-12-22 04:24:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:17,217 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-22 04:24:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:24:17,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:24:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:17,219 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:24:17,219 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:24:17,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:24:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:24:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2020-12-22 04:24:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:24:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 04:24:17,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-22 04:24:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:17,224 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 04:24:17,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:24:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 04:24:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:24:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:17,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:17,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:24:17,440 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 2 times [2020-12-22 04:24:17,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:17,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616683615] [2020-12-22 04:24:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:17,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616683615] [2020-12-22 04:24:17,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682251833] [2020-12-22 04:24:17,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:24:17,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:24:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:17,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:17,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:24:17,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007372166] [2020-12-22 04:24:17,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:24:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:24:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:24:17,660 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-12-22 04:24:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:17,723 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2020-12-22 04:24:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:24:17,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:24:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:17,725 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:24:17,725 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:24:17,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:24:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:24:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2020-12-22 04:24:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:24:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-22 04:24:17,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2020-12-22 04:24:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:17,732 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-22 04:24:17,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:24:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-22 04:24:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:24:17,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:17,733 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:17,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:17,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 744287225, now seen corresponding path program 1 times [2020-12-22 04:24:17,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:17,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013565091] [2020-12-22 04:24:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013565091] [2020-12-22 04:24:18,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:24:18,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:24:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312570864] [2020-12-22 04:24:18,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:24:18,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:24:18,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:24:18,014 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-12-22 04:24:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:18,027 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-22 04:24:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:24:18,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:24:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:18,029 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:24:18,029 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:24:18,030 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 04:24:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:24:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-12-22 04:24:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:24:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-22 04:24:18,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2020-12-22 04:24:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:18,036 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-22 04:24:18,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:24:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-22 04:24:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:24:18,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:18,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:18,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:24:18,038 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 1 times [2020-12-22 04:24:18,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:18,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177764791] [2020-12-22 04:24:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177764791] [2020-12-22 04:24:18,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540254590] [2020-12-22 04:24:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:24:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:24:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:18,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:24:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900171169] [2020-12-22 04:24:18,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:24:18,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:24:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:24:18,205 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 6 states. [2020-12-22 04:24:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:18,254 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-22 04:24:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:24:18,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:24:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:18,256 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:24:18,256 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:24:18,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:24:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:24:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-22 04:24:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:24:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 04:24:18,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-12-22 04:24:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:18,263 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 04:24:18,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:24:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 04:24:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:24:18,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:18,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:18,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:18,479 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1267267040, now seen corresponding path program 3 times [2020-12-22 04:24:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:18,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073085839] [2020-12-22 04:24:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073085839] [2020-12-22 04:24:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951050950] [2020-12-22 04:24:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:24:18,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:24:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:24:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:18,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:18,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:24:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225889085] [2020-12-22 04:24:18,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:24:18,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:24:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:24:18,711 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-12-22 04:24:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:18,769 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2020-12-22 04:24:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:24:18,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:24:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:18,770 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:24:18,771 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:24:18,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:24:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:24:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-12-22 04:24:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:24:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-22 04:24:18,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2020-12-22 04:24:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:18,777 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-22 04:24:18,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:24:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-22 04:24:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:24:18,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:18,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:18,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:18,992 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1250845852, now seen corresponding path program 2 times [2020-12-22 04:24:18,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:18,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933325058] [2020-12-22 04:24:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:24:19,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933325058] [2020-12-22 04:24:19,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:24:19,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:24:19,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747122952] [2020-12-22 04:24:19,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:24:19,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:24:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:24:19,038 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 3 states. [2020-12-22 04:24:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:19,054 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-12-22 04:24:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:24:19,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:24:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:19,055 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:24:19,055 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:24:19,056 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 04:24:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:24:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-12-22 04:24:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:24:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 04:24:19,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-12-22 04:24:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:19,061 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 04:24:19,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:24:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 04:24:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:24:19,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:19,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:19,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 04:24:19,063 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 2 times [2020-12-22 04:24:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:19,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768488931] [2020-12-22 04:24:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:19,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768488931] [2020-12-22 04:24:19,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641613161] [2020-12-22 04:24:19,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:24:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:24:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:19,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:19,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:24:19,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20134776] [2020-12-22 04:24:19,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:24:19,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:19,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:24:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:24:19,210 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-12-22 04:24:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:19,254 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-22 04:24:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:24:19,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:24:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:19,256 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:24:19,256 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:24:19,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:24:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:24:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 04:24:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:24:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 04:24:19,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2020-12-22 04:24:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:19,262 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 04:24:19,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:24:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 04:24:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:24:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:19,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:19,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:19,474 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 4 times [2020-12-22 04:24:19,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997026591] [2020-12-22 04:24:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:19,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997026591] [2020-12-22 04:24:19,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170944189] [2020-12-22 04:24:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:24:19,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:24:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:19,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:19,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:24:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965031397] [2020-12-22 04:24:19,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:24:19,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:24:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:24:19,764 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-22 04:24:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:19,846 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 04:24:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:24:19,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:24:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:19,848 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:24:19,848 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:24:19,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:24:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:24:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 04:24:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:24:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:24:19,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-12-22 04:24:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:19,855 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:24:19,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:24:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:24:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:24:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:19,856 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:20,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:20,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 3 times [2020-12-22 04:24:20,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:20,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175006363] [2020-12-22 04:24:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175006363] [2020-12-22 04:24:20,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850393648] [2020-12-22 04:24:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:24:20,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:24:20,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:24:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:20,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:20,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:24:20,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234618474] [2020-12-22 04:24:20,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:24:20,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:24:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:24:20,436 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-12-22 04:24:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:20,512 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-22 04:24:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:24:20,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:24:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:20,513 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:24:20,513 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:24:20,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:24:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:24:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 04:24:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:24:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 04:24:20,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2020-12-22 04:24:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:20,520 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 04:24:20,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:24:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 04:24:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:24:20,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:20,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:20,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:20,737 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:20,738 INFO L82 PathProgramCache]: Analyzing trace with hash -533681750, now seen corresponding path program 5 times [2020-12-22 04:24:20,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:20,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257196968] [2020-12-22 04:24:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:20,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257196968] [2020-12-22 04:24:20,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559193518] [2020-12-22 04:24:20,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 04:24:20,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:24:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:24:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:20,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:20,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:24:20,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559990849] [2020-12-22 04:24:20,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:24:20,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:20,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:24:20,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:24:20,996 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-12-22 04:24:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:21,089 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 04:24:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:24:21,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:24:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:21,090 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:24:21,090 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:24:21,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:24:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:24:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 04:24:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:24:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:24:21,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2020-12-22 04:24:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:21,097 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:24:21,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:24:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:24:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:24:21,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:21,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:21,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:24:21,313 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1190114208, now seen corresponding path program 4 times [2020-12-22 04:24:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:21,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836820087] [2020-12-22 04:24:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:21,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836820087] [2020-12-22 04:24:21,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188098659] [2020-12-22 04:24:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:24:21,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:21,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:24:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:21,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:21,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:24:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256949841] [2020-12-22 04:24:21,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:24:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:24:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:24:21,532 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-12-22 04:24:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:21,619 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 04:24:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:24:21,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:24:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:21,620 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:24:21,620 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:24:21,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:24:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:24:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 04:24:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:24:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 04:24:21,628 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2020-12-22 04:24:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:21,628 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 04:24:21,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:24:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 04:24:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:24:21,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:21,629 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:21,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:21,839 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 6 times [2020-12-22 04:24:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:21,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481366043] [2020-12-22 04:24:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481366043] [2020-12-22 04:24:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649018652] [2020-12-22 04:24:21,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:22,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:24:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:24:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:22,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:22,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:24:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666278917] [2020-12-22 04:24:22,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:24:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:22,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:24:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:24:22,097 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-12-22 04:24:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:22,188 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-22 04:24:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:24:22,189 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:24:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:22,190 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:24:22,190 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:24:22,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:24:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:24:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 04:24:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:24:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 04:24:22,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-12-22 04:24:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:22,196 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 04:24:22,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:24:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 04:24:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:24:22,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:22,197 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:22,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:22,404 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1288795907, now seen corresponding path program 5 times [2020-12-22 04:24:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:22,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830837905] [2020-12-22 04:24:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:22,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830837905] [2020-12-22 04:24:22,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987800279] [2020-12-22 04:24:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:22,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:24:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:24:22,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:22,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:22,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:24:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138772349] [2020-12-22 04:24:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:24:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:24:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:24:22,668 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2020-12-22 04:24:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:22,790 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 04:24:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:24:22,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:24:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:22,792 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:24:22,792 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:24:22,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:24:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:24:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 04:24:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:24:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 04:24:22,798 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2020-12-22 04:24:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:22,798 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 04:24:22,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:24:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 04:24:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:24:22,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:22,799 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:23,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:24:23,015 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:23,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1335587892, now seen corresponding path program 7 times [2020-12-22 04:24:23,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:23,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175860147] [2020-12-22 04:24:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175860147] [2020-12-22 04:24:23,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439713547] [2020-12-22 04:24:23,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:24:23,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:23,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:23,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:24:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594284339] [2020-12-22 04:24:23,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:24:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:24:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:24:23,253 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2020-12-22 04:24:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:23,372 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-22 04:24:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:24:23,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:24:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:23,373 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:24:23,373 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:24:23,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:24:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:24:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 04:24:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:24:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 04:24:23,380 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2020-12-22 04:24:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:23,380 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 04:24:23,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:24:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 04:24:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:24:23,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:23,381 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:23,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:24:23,596 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 6 times [2020-12-22 04:24:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:23,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513679251] [2020-12-22 04:24:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513679251] [2020-12-22 04:24:23,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460136246] [2020-12-22 04:24:23,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:23,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 04:24:23,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:24:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:23,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:23,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:24:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028045982] [2020-12-22 04:24:23,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:24:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:24:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:24:23,942 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-12-22 04:24:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:24,112 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 04:24:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:24:24,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:24:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:24,114 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:24:24,114 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:24:24,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:24:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:24:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 04:24:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:24:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 04:24:24,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2020-12-22 04:24:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:24,121 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 04:24:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:24:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 04:24:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:24:24,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:24,122 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:24,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:24:24,329 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -643067495, now seen corresponding path program 8 times [2020-12-22 04:24:24,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:24,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585012652] [2020-12-22 04:24:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585012652] [2020-12-22 04:24:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747500565] [2020-12-22 04:24:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:24,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:24:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:24,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:24,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:24:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336382446] [2020-12-22 04:24:24,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:24:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:24:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:24:24,642 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2020-12-22 04:24:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:24,792 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 04:24:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:24:24,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:24:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:24,796 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:24:24,796 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:24:24,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:24:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:24:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 04:24:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:24:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 04:24:24,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2020-12-22 04:24:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:24,809 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 04:24:24,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:24:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 04:24:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:24:24,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:24,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:25,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:25,030 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1342916489, now seen corresponding path program 7 times [2020-12-22 04:24:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:25,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695959327] [2020-12-22 04:24:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695959327] [2020-12-22 04:24:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896199526] [2020-12-22 04:24:25,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:24:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:25,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:25,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:24:25,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234535015] [2020-12-22 04:24:25,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:24:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:24:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:24:25,327 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-12-22 04:24:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:25,500 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 04:24:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:24:25,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:24:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:25,501 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:24:25,501 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:24:25,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:24:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:24:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 04:24:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:24:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 04:24:25,514 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 22 [2020-12-22 04:24:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:25,514 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 04:24:25,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:24:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 04:24:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:24:25,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:25,515 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:25,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:25,729 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash 539617726, now seen corresponding path program 9 times [2020-12-22 04:24:25,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:25,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384149842] [2020-12-22 04:24:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:25,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384149842] [2020-12-22 04:24:25,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102183436] [2020-12-22 04:24:25,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:25,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:24:25,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:25,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:24:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:26,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:26,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:24:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483989048] [2020-12-22 04:24:26,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:24:26,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:24:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:24:26,064 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-12-22 04:24:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:26,230 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 04:24:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:24:26,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:24:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:26,231 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:24:26,231 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:24:26,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:24:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:24:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 04:24:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:24:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 04:24:26,238 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 24 [2020-12-22 04:24:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:26,238 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 04:24:26,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:24:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 04:24:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:24:26,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:26,239 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:26,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:26,454 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2102899884, now seen corresponding path program 8 times [2020-12-22 04:24:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:26,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809423681] [2020-12-22 04:24:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809423681] [2020-12-22 04:24:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417443590] [2020-12-22 04:24:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:26,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:24:26,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:26,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:26,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:24:26,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722884304] [2020-12-22 04:24:26,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:24:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:24:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:24:26,770 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2020-12-22 04:24:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:26,952 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-22 04:24:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:24:26,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:24:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:26,953 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:24:26,953 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:24:26,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:24:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:24:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-22 04:24:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:24:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:24:26,959 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 24 [2020-12-22 04:24:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:26,960 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:24:26,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:24:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:24:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:24:26,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:26,961 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:27,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:24:27,175 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1066218333, now seen corresponding path program 10 times [2020-12-22 04:24:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:27,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351409617] [2020-12-22 04:24:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351409617] [2020-12-22 04:24:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985651160] [2020-12-22 04:24:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:27,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:24:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:27,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:27,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:24:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206310128] [2020-12-22 04:24:27,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:24:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:24:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:24:27,501 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 14 states. [2020-12-22 04:24:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:27,705 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 04:24:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:24:27,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:24:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:27,706 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:24:27,706 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:24:27,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:24:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:24:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-22 04:24:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:24:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:24:27,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 26 [2020-12-22 04:24:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:27,712 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:24:27,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:24:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:24:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:24:27,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:27,712 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:27,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:24:27,921 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1992465137, now seen corresponding path program 9 times [2020-12-22 04:24:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900900893] [2020-12-22 04:24:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900900893] [2020-12-22 04:24:28,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42368795] [2020-12-22 04:24:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:28,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-22 04:24:28,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:24:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:28,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:24:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590724662] [2020-12-22 04:24:28,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:24:28,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:24:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:24:28,305 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2020-12-22 04:24:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:28,530 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-22 04:24:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:24:28,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:24:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:28,532 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:24:28,532 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:24:28,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:24:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:24:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 04:24:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:24:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:24:28,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 26 [2020-12-22 04:24:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:28,538 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:24:28,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:24:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:24:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:24:28,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:28,538 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:28,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:24:28,752 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1913555528, now seen corresponding path program 11 times [2020-12-22 04:24:28,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:28,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262608376] [2020-12-22 04:24:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262608376] [2020-12-22 04:24:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245268208] [2020-12-22 04:24:28,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:29,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:24:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:24:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:29,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:29,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:24:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130880016] [2020-12-22 04:24:29,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:24:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:24:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:24:29,208 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2020-12-22 04:24:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:29,427 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 04:24:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:24:29,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:24:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:29,428 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:24:29,429 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:24:29,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:24:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:24:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-22 04:24:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:24:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-22 04:24:29,434 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2020-12-22 04:24:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-22 04:24:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:24:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-22 04:24:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:24:29,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:29,435 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:29,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:24:29,648 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 846760114, now seen corresponding path program 10 times [2020-12-22 04:24:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:29,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038595419] [2020-12-22 04:24:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:29,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038595419] [2020-12-22 04:24:29,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953353425] [2020-12-22 04:24:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:29,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:29,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:24:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:29,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:29,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:24:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126521617] [2020-12-22 04:24:29,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:24:29,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:24:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:24:29,956 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 15 states. [2020-12-22 04:24:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:30,232 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-22 04:24:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:24:30,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:24:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:30,233 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:24:30,233 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:24:30,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:24:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:24:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-22 04:24:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:24:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 04:24:30,238 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 28 [2020-12-22 04:24:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:30,238 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 04:24:30,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:24:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 04:24:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:24:30,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:30,239 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:30,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:24:30,453 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash 733049517, now seen corresponding path program 12 times [2020-12-22 04:24:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:30,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424622890] [2020-12-22 04:24:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424622890] [2020-12-22 04:24:30,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673584023] [2020-12-22 04:24:30,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:30,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:24:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:24:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:24:31,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727189261] [2020-12-22 04:24:31,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:24:31,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:24:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:24:31,044 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 16 states. [2020-12-22 04:24:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:31,318 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-22 04:24:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:24:31,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:24:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:31,319 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:24:31,319 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:24:31,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:24:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:24:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 04:24:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:24:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 04:24:31,325 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 30 [2020-12-22 04:24:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:31,325 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 04:24:31,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:24:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 04:24:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:24:31,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:31,326 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:31,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:31,529 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2037993365, now seen corresponding path program 11 times [2020-12-22 04:24:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:31,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078375865] [2020-12-22 04:24:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078375865] [2020-12-22 04:24:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756012170] [2020-12-22 04:24:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:32,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:24:32,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:24:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:32,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:32,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:24:32,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482974569] [2020-12-22 04:24:32,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:24:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:24:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:24:32,409 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2020-12-22 04:24:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:32,735 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-22 04:24:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:24:32,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:24:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:32,736 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:24:32,736 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:24:32,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:24:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:24:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-22 04:24:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:24:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 04:24:32,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 30 [2020-12-22 04:24:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:32,756 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 04:24:32,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:24:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 04:24:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:24:32,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:32,757 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:32,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:24:32,961 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 138139090, now seen corresponding path program 13 times [2020-12-22 04:24:32,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:32,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421607600] [2020-12-22 04:24:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421607600] [2020-12-22 04:24:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701740176] [2020-12-22 04:24:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:24:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:33,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:33,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:24:33,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771568008] [2020-12-22 04:24:33,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:24:33,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:33,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:24:33,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:24:33,325 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-12-22 04:24:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:33,681 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-12-22 04:24:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:24:33,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:24:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:33,683 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:24:33,684 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:24:33,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:24:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:24:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 04:24:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:24:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 04:24:33,689 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2020-12-22 04:24:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:33,689 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 04:24:33,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:24:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 04:24:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:24:33,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:33,689 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:33,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:33,894 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash 56879544, now seen corresponding path program 12 times [2020-12-22 04:24:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:33,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998574586] [2020-12-22 04:24:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998574586] [2020-12-22 04:24:34,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96869284] [2020-12-22 04:24:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:34,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 04:24:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:24:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:34,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:34,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:24:34,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083527765] [2020-12-22 04:24:34,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:24:34,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:24:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:24:34,364 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 17 states. [2020-12-22 04:24:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:34,750 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-22 04:24:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:24:34,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:24:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:34,751 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:24:34,751 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:24:34,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:24:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:24:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-22 04:24:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:24:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 04:24:34,757 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 32 [2020-12-22 04:24:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:34,757 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 04:24:34,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:24:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 04:24:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:24:34,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:34,758 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:34,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:24:34,972 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash -340130889, now seen corresponding path program 14 times [2020-12-22 04:24:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:34,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667074914] [2020-12-22 04:24:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667074914] [2020-12-22 04:24:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263714944] [2020-12-22 04:24:35,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:35,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:35,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:24:35,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:35,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:35,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:24:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178038667] [2020-12-22 04:24:35,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:24:35,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:35,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:24:35,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:24:35,385 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-12-22 04:24:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:35,727 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-12-22 04:24:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:24:35,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:24:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:35,729 INFO L225 Difference]: With dead ends: 69 [2020-12-22 04:24:35,729 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:24:35,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:24:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:24:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-22 04:24:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:24:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 04:24:35,735 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 34 [2020-12-22 04:24:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:35,735 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 04:24:35,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:24:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 04:24:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:24:35,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:35,736 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:35,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:35,950 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1122990309, now seen corresponding path program 13 times [2020-12-22 04:24:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:35,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671238951] [2020-12-22 04:24:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671238951] [2020-12-22 04:24:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206237151] [2020-12-22 04:24:36,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:24:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:36,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:36,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:24:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429767565] [2020-12-22 04:24:36,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:24:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:24:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:24:36,330 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2020-12-22 04:24:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:36,765 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-12-22 04:24:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:24:36,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:24:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:36,766 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:24:36,767 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:24:36,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:24:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:24:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-22 04:24:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:24:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 04:24:36,772 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 34 [2020-12-22 04:24:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:36,772 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 04:24:36,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:24:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 04:24:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:24:36,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:36,774 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:36,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:24:36,981 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash -396080036, now seen corresponding path program 15 times [2020-12-22 04:24:36,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:36,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417478302] [2020-12-22 04:24:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417478302] [2020-12-22 04:24:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103494679] [2020-12-22 04:24:37,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:37,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:24:37,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:24:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:37,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:37,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:24:37,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639229443] [2020-12-22 04:24:37,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:24:37,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:37,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:24:37,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:24:37,642 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 19 states. [2020-12-22 04:24:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:38,089 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-22 04:24:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:24:38,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:24:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:38,091 INFO L225 Difference]: With dead ends: 73 [2020-12-22 04:24:38,091 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:24:38,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:24:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:24:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 04:24:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:24:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-22 04:24:38,096 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 36 [2020-12-22 04:24:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:38,097 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-22 04:24:38,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:24:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-22 04:24:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:24:38,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:38,097 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:38,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:38,302 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:38,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1106552898, now seen corresponding path program 14 times [2020-12-22 04:24:38,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:38,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75482296] [2020-12-22 04:24:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:38,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75482296] [2020-12-22 04:24:38,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304230938] [2020-12-22 04:24:38,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:38,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:24:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:38,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:38,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:24:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255848267] [2020-12-22 04:24:38,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:24:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:24:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:24:38,769 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 19 states. [2020-12-22 04:24:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:39,300 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-22 04:24:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:24:39,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:24:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:39,301 INFO L225 Difference]: With dead ends: 75 [2020-12-22 04:24:39,301 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:24:39,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:24:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:24:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 04:24:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:24:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 04:24:39,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 36 [2020-12-22 04:24:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:39,308 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 04:24:39,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:24:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 04:24:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:24:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:39,308 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:39,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:24:39,522 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1671364545, now seen corresponding path program 16 times [2020-12-22 04:24:39,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:39,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122525249] [2020-12-22 04:24:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:39,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122525249] [2020-12-22 04:24:39,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479730130] [2020-12-22 04:24:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:39,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:39,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:24:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:39,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:39,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:24:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070252365] [2020-12-22 04:24:39,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:24:39,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:39,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:24:39,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:24:39,995 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 20 states. [2020-12-22 04:24:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:40,413 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-12-22 04:24:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:24:40,413 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-22 04:24:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:40,414 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:24:40,414 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 04:24:40,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:24:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 04:24:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-22 04:24:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:24:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:24:40,419 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 38 [2020-12-22 04:24:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:40,419 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:24:40,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:24:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:24:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:24:40,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:40,420 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:40,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:40,634 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 15 times [2020-12-22 04:24:40,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:40,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213739641] [2020-12-22 04:24:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:40,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213739641] [2020-12-22 04:24:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046316258] [2020-12-22 04:24:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:41,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-22 04:24:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:24:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:41,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:41,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:24:41,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362393691] [2020-12-22 04:24:41,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:24:41,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:24:41,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:24:41,230 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2020-12-22 04:24:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:41,761 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-12-22 04:24:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:24:41,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-22 04:24:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:41,763 INFO L225 Difference]: With dead ends: 79 [2020-12-22 04:24:41,763 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 04:24:41,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:24:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 04:24:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 04:24:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:24:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:24:41,769 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 38 [2020-12-22 04:24:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:41,769 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:24:41,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:24:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:24:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:24:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:41,770 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:41,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:24:41,974 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -84251162, now seen corresponding path program 17 times [2020-12-22 04:24:41,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384698681] [2020-12-22 04:24:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:42,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384698681] [2020-12-22 04:24:42,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239272410] [2020-12-22 04:24:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:42,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:24:42,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:24:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:43,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:43,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:24:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205077672] [2020-12-22 04:24:43,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:24:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:24:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:24:43,185 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2020-12-22 04:24:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:43,724 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-22 04:24:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:24:43,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:24:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:43,725 INFO L225 Difference]: With dead ends: 81 [2020-12-22 04:24:43,725 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:24:43,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:24:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:24:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-22 04:24:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 04:24:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-22 04:24:43,730 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2020-12-22 04:24:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:43,731 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-22 04:24:43,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:24:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-22 04:24:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:24:43,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:43,731 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:43,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:24:43,934 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -610250044, now seen corresponding path program 16 times [2020-12-22 04:24:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:43,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958185231] [2020-12-22 04:24:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:44,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958185231] [2020-12-22 04:24:44,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685244019] [2020-12-22 04:24:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:44,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:24:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:44,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:44,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:24:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176920492] [2020-12-22 04:24:44,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:24:44,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:24:44,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:24:44,450 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-12-22 04:24:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:45,117 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-12-22 04:24:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:24:45,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:24:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:45,118 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:24:45,119 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:24:45,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:24:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:24:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-22 04:24:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:24:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 04:24:45,124 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 40 [2020-12-22 04:24:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:45,124 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 04:24:45,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:24:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 04:24:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:24:45,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:45,125 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:45,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:24:45,340 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash 691201739, now seen corresponding path program 18 times [2020-12-22 04:24:45,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:45,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991278266] [2020-12-22 04:24:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991278266] [2020-12-22 04:24:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495634498] [2020-12-22 04:24:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:45,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:24:45,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:24:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:46,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:46,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:24:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862184131] [2020-12-22 04:24:46,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:24:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:24:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:24:46,203 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 22 states. [2020-12-22 04:24:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:46,826 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-22 04:24:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:24:46,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:24:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:46,828 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:24:46,828 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:24:46,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:24:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:24:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-22 04:24:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:24:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 04:24:46,835 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 42 [2020-12-22 04:24:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:46,835 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 04:24:46,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:24:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 04:24:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:24:46,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:46,836 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:47,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:24:47,040 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2010570023, now seen corresponding path program 17 times [2020-12-22 04:24:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819348864] [2020-12-22 04:24:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819348864] [2020-12-22 04:24:47,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98305318] [2020-12-22 04:24:47,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:48,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:24:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:24:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:49,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:49,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:24:49,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566331206] [2020-12-22 04:24:49,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:24:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:24:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:24:49,063 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 22 states. [2020-12-22 04:24:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:49,799 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-12-22 04:24:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:24:49,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:24:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:49,801 INFO L225 Difference]: With dead ends: 87 [2020-12-22 04:24:49,801 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:24:49,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:24:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:24:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-22 04:24:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:24:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-22 04:24:49,807 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 42 [2020-12-22 04:24:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:49,807 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-22 04:24:49,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:24:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-22 04:24:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:24:49,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:49,808 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:50,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:24:50,012 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1422869904, now seen corresponding path program 19 times [2020-12-22 04:24:50,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:50,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587900648] [2020-12-22 04:24:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587900648] [2020-12-22 04:24:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262209440] [2020-12-22 04:24:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:24:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:50,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:50,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:24:50,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935864130] [2020-12-22 04:24:50,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:24:50,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:24:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:24:50,620 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 23 states. [2020-12-22 04:24:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:51,307 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-12-22 04:24:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:24:51,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:24:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:51,308 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:24:51,309 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 04:24:51,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:24:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 04:24:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-12-22 04:24:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:24:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-22 04:24:51,314 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 44 [2020-12-22 04:24:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:51,315 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-22 04:24:51,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:24:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-22 04:24:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:24:51,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:51,315 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:51,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:24:51,531 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:51,531 INFO L82 PathProgramCache]: Analyzing trace with hash -527148342, now seen corresponding path program 18 times [2020-12-22 04:24:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:51,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566998588] [2020-12-22 04:24:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:51,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566998588] [2020-12-22 04:24:51,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336135809] [2020-12-22 04:24:51,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:52,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 04:24:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:24:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:53,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:53,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:24:53,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037609948] [2020-12-22 04:24:53,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:24:53,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:24:53,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:24:53,066 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 23 states. [2020-12-22 04:24:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:53,882 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-12-22 04:24:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:24:53,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:24:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:53,883 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:24:53,883 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 04:24:53,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 14 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:24:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 04:24:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-22 04:24:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:24:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 04:24:53,888 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 44 [2020-12-22 04:24:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:53,889 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 04:24:53,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:24:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 04:24:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:24:53,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:53,889 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:54,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 04:24:54,093 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1526187819, now seen corresponding path program 20 times [2020-12-22 04:24:54,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:54,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410850224] [2020-12-22 04:24:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410850224] [2020-12-22 04:24:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482195425] [2020-12-22 04:24:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:54,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:24:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:54,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:54,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:24:54,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503626648] [2020-12-22 04:24:54,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:24:54,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:24:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:24:54,682 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 24 states. [2020-12-22 04:24:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:55,399 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-22 04:24:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:24:55,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:24:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:55,401 INFO L225 Difference]: With dead ends: 93 [2020-12-22 04:24:55,401 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:24:55,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:24:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:24:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-22 04:24:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:24:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 04:24:55,406 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 46 [2020-12-22 04:24:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:55,406 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 04:24:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:24:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 04:24:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:24:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:55,407 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:55,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:55,621 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash 266927021, now seen corresponding path program 19 times [2020-12-22 04:24:55,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:55,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046809611] [2020-12-22 04:24:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046809611] [2020-12-22 04:24:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769511554] [2020-12-22 04:24:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:24:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:56,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:56,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:24:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49334402] [2020-12-22 04:24:56,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:24:56,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:24:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:24:56,251 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 24 states. [2020-12-22 04:24:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:57,142 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-12-22 04:24:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:24:57,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:24:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:57,144 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:24:57,144 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 04:24:57,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:24:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 04:24:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-22 04:24:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:24:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 04:24:57,150 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 46 [2020-12-22 04:24:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:57,150 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 04:24:57,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:24:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 04:24:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:24:57,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:57,151 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:57,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:57,367 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:57,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2030456326, now seen corresponding path program 21 times [2020-12-22 04:24:57,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:57,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000011093] [2020-12-22 04:24:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000011093] [2020-12-22 04:24:57,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385169373] [2020-12-22 04:24:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:58,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:24:58,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:24:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:58,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:58,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:24:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738158720] [2020-12-22 04:24:58,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:24:58,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:24:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:24:58,403 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 25 states. [2020-12-22 04:24:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:59,112 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-12-22 04:24:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:24:59,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:24:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:59,114 INFO L225 Difference]: With dead ends: 97 [2020-12-22 04:24:59,114 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 04:24:59,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:24:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 04:24:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-22 04:24:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 04:24:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-22 04:24:59,122 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 48 [2020-12-22 04:24:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:59,122 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-22 04:24:59,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:24:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-22 04:24:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:24:59,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:59,123 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:59,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:59,329 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1130827824, now seen corresponding path program 20 times [2020-12-22 04:24:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490649913] [2020-12-22 04:24:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:59,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490649913] [2020-12-22 04:24:59,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403022241] [2020-12-22 04:24:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:59,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:24:59,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:59,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:24:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:24:59,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:59,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:24:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188200052] [2020-12-22 04:24:59,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:24:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:24:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:24:59,985 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 25 states. [2020-12-22 04:25:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:00,819 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-22 04:25:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:25:00,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:25:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:00,820 INFO L225 Difference]: With dead ends: 99 [2020-12-22 04:25:00,820 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 04:25:00,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:25:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 04:25:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-22 04:25:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:25:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-22 04:25:00,826 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 48 [2020-12-22 04:25:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:00,826 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-22 04:25:00,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:25:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-22 04:25:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:25:00,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:00,827 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:01,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:25:01,041 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1301187105, now seen corresponding path program 22 times [2020-12-22 04:25:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:01,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109485251] [2020-12-22 04:25:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109485251] [2020-12-22 04:25:01,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042795220] [2020-12-22 04:25:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:01,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:01,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:25:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:01,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:01,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:25:01,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400671360] [2020-12-22 04:25:01,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:25:01,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:25:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:25:01,770 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 26 states. [2020-12-22 04:25:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:02,501 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-12-22 04:25:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:25:02,501 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-22 04:25:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:02,502 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:25:02,502 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:25:02,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:25:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:25:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-12-22 04:25:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:25:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-22 04:25:02,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 50 [2020-12-22 04:25:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:02,508 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-22 04:25:02,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:25:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-22 04:25:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:25:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:02,509 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:02,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:02,714 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash -48470221, now seen corresponding path program 21 times [2020-12-22 04:25:02,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:02,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663728357] [2020-12-22 04:25:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663728357] [2020-12-22 04:25:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319966101] [2020-12-22 04:25:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:03,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-22 04:25:03,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:03,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:25:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:03,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:03,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:25:03,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94059848] [2020-12-22 04:25:03,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:25:03,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:03,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:25:03,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:25:03,956 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 26 states. [2020-12-22 04:25:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:04,913 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-12-22 04:25:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:25:04,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-22 04:25:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:04,917 INFO L225 Difference]: With dead ends: 103 [2020-12-22 04:25:04,917 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:25:04,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:25:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:25:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-22 04:25:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:25:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-22 04:25:04,925 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 50 [2020-12-22 04:25:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:04,926 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-22 04:25:04,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:25:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-22 04:25:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:25:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:04,926 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:05,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:05,131 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash -553134972, now seen corresponding path program 23 times [2020-12-22 04:25:05,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:05,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035373236] [2020-12-22 04:25:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035373236] [2020-12-22 04:25:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819744073] [2020-12-22 04:25:05,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:11,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:25:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:11,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:25:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:11,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:11,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:25:11,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474612818] [2020-12-22 04:25:11,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:25:11,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:25:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:25:11,886 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 27 states. [2020-12-22 04:25:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:12,791 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-12-22 04:25:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:25:12,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:25:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:12,792 INFO L225 Difference]: With dead ends: 105 [2020-12-22 04:25:12,793 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:25:12,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:25:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:25:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-22 04:25:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 04:25:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-12-22 04:25:12,798 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 52 [2020-12-22 04:25:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:12,798 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-12-22 04:25:12,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:25:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-12-22 04:25:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:25:12,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:12,799 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:13,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:25:13,004 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 715100630, now seen corresponding path program 22 times [2020-12-22 04:25:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570975649] [2020-12-22 04:25:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:13,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570975649] [2020-12-22 04:25:13,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296607423] [2020-12-22 04:25:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:13,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:13,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:25:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:13,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:13,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:25:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225515940] [2020-12-22 04:25:13,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:25:13,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:25:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:25:13,721 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 27 states. [2020-12-22 04:25:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:14,878 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-12-22 04:25:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:25:14,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:25:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:14,880 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:25:14,880 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 04:25:14,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:25:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 04:25:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-22 04:25:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:25:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-22 04:25:14,886 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 52 [2020-12-22 04:25:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:14,886 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-22 04:25:14,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:25:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-22 04:25:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:25:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:14,887 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:15,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:25:15,088 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1065426409, now seen corresponding path program 24 times [2020-12-22 04:25:15,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:15,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617550893] [2020-12-22 04:25:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617550893] [2020-12-22 04:25:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508267610] [2020-12-22 04:25:15,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:16,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:25:16,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:16,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:25:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:16,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:16,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:25:16,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144398435] [2020-12-22 04:25:16,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:25:16,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:16,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:25:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:25:16,898 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 28 states. [2020-12-22 04:25:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:17,916 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2020-12-22 04:25:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:25:17,917 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:25:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:17,918 INFO L225 Difference]: With dead ends: 109 [2020-12-22 04:25:17,918 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 04:25:17,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:25:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 04:25:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-22 04:25:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:25:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 04:25:17,925 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 54 [2020-12-22 04:25:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:17,926 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 04:25:17,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:25:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 04:25:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:25:17,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:17,927 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:18,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:25:18,132 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 67280825, now seen corresponding path program 23 times [2020-12-22 04:25:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:18,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343503317] [2020-12-22 04:25:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:18,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343503317] [2020-12-22 04:25:18,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729436483] [2020-12-22 04:25:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:21,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:25:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:25:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:22,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:22,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:25:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073944709] [2020-12-22 04:25:22,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:25:22,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:25:22,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:25:22,103 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 28 states. [2020-12-22 04:25:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:23,210 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-22 04:25:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:25:23,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:25:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:23,213 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:25:23,213 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:25:23,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:25:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:25:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-22 04:25:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:25:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-22 04:25:23,219 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 54 [2020-12-22 04:25:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:23,219 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-22 04:25:23,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:25:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-22 04:25:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:25:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:23,221 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:23,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:23,422 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:23,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1724752398, now seen corresponding path program 25 times [2020-12-22 04:25:23,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:23,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856943149] [2020-12-22 04:25:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856943149] [2020-12-22 04:25:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376308285] [2020-12-22 04:25:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:25:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:24,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:24,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:25:24,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567726101] [2020-12-22 04:25:24,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:25:24,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:25:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:24,312 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 29 states. [2020-12-22 04:25:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:25,419 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-12-22 04:25:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:25:25,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:25:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:25,421 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:25:25,421 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 04:25:25,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 04:25:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-22 04:25:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 04:25:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-22 04:25:25,427 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2020-12-22 04:25:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:25,427 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-22 04:25:25,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:25:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-22 04:25:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:25:25,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:25,428 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:25,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:25,642 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:25,642 INFO L82 PathProgramCache]: Analyzing trace with hash 282706140, now seen corresponding path program 24 times [2020-12-22 04:25:25,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:25,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429920471] [2020-12-22 04:25:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429920471] [2020-12-22 04:25:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654539602] [2020-12-22 04:25:26,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:27,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-22 04:25:27,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:25:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:28,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:28,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:25:28,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051373501] [2020-12-22 04:25:28,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:25:28,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:28,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:25:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:28,413 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 29 states. [2020-12-22 04:25:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:29,736 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-12-22 04:25:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:25:29,736 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:25:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:29,738 INFO L225 Difference]: With dead ends: 115 [2020-12-22 04:25:29,738 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 04:25:29,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 04:25:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-22 04:25:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:25:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 04:25:29,743 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 56 [2020-12-22 04:25:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 04:25:29,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:25:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 04:25:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:25:29,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:29,744 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:29,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:25:29,945 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -318131981, now seen corresponding path program 26 times [2020-12-22 04:25:29,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:29,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314583072] [2020-12-22 04:25:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314583072] [2020-12-22 04:25:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322646569] [2020-12-22 04:25:30,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:30,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:30,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:25:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:30,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:30,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:25:30,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030809333] [2020-12-22 04:25:30,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:25:30,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:25:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:25:30,870 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 30 states. [2020-12-22 04:25:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:32,004 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-12-22 04:25:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:25:32,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:25:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:32,006 INFO L225 Difference]: With dead ends: 117 [2020-12-22 04:25:32,006 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 04:25:32,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:25:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 04:25:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-12-22 04:25:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:25:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-22 04:25:32,011 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 58 [2020-12-22 04:25:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:32,011 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-22 04:25:32,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:25:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-22 04:25:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:25:32,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:32,012 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:32,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:32,221 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1148003647, now seen corresponding path program 25 times [2020-12-22 04:25:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:32,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159425239] [2020-12-22 04:25:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159425239] [2020-12-22 04:25:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764484301] [2020-12-22 04:25:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:25:32,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:33,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:33,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:25:33,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043615766] [2020-12-22 04:25:33,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:25:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:25:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:25:33,065 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 30 states. [2020-12-22 04:25:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:34,535 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2020-12-22 04:25:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:25:34,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:25:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:34,536 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:25:34,537 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 04:25:34,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:25:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 04:25:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-12-22 04:25:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:25:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 04:25:34,542 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 58 [2020-12-22 04:25:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:34,543 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 04:25:34,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:25:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 04:25:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:25:34,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:34,544 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:34,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 04:25:34,758 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash -729965928, now seen corresponding path program 27 times [2020-12-22 04:25:34,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:34,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449903011] [2020-12-22 04:25:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449903011] [2020-12-22 04:25:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000367177] [2020-12-22 04:25:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:36,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:25:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:36,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:25:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:36,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:36,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:25:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185387788] [2020-12-22 04:25:36,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:25:36,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:25:36,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:25:36,750 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 31 states. [2020-12-22 04:25:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:37,886 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2020-12-22 04:25:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:25:37,886 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:25:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:37,887 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:25:37,887 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 04:25:37,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:25:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 04:25:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-12-22 04:25:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-22 04:25:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-12-22 04:25:37,894 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 60 [2020-12-22 04:25:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:37,894 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-12-22 04:25:37,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:25:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-12-22 04:25:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:25:37,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:37,895 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:38,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:25:38,100 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -524747550, now seen corresponding path program 26 times [2020-12-22 04:25:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:38,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212012037] [2020-12-22 04:25:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212012037] [2020-12-22 04:25:38,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979114079] [2020-12-22 04:25:38,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:25:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:39,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:39,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:25:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203344860] [2020-12-22 04:25:39,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:25:39,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:39,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:25:39,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:25:39,105 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 31 states. [2020-12-22 04:25:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:40,615 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-12-22 04:25:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:25:40,616 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:25:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:40,619 INFO L225 Difference]: With dead ends: 123 [2020-12-22 04:25:40,619 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:25:40,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:25:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:25:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-22 04:25:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 04:25:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-12-22 04:25:40,626 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 60 [2020-12-22 04:25:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:40,626 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-12-22 04:25:40,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:25:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-12-22 04:25:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:25:40,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:40,627 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:40,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 04:25:40,841 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1365397763, now seen corresponding path program 28 times [2020-12-22 04:25:40,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:40,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422913581] [2020-12-22 04:25:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:41,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422913581] [2020-12-22 04:25:41,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026128691] [2020-12-22 04:25:41,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:41,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:41,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:25:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:41,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:41,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:25:41,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671230925] [2020-12-22 04:25:41,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:25:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:25:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:41,910 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 32 states. [2020-12-22 04:25:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:43,305 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2020-12-22 04:25:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:25:43,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:25:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:43,307 INFO L225 Difference]: With dead ends: 125 [2020-12-22 04:25:43,307 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 04:25:43,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 04:25:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-22 04:25:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 04:25:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-12-22 04:25:43,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 62 [2020-12-22 04:25:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:43,314 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-12-22 04:25:43,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:25:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-12-22 04:25:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:25:43,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:43,315 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:43,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 04:25:43,529 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1720879163, now seen corresponding path program 27 times [2020-12-22 04:25:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:43,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064121833] [2020-12-22 04:25:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064121833] [2020-12-22 04:25:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914435595] [2020-12-22 04:25:44,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:45,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2020-12-22 04:25:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:25:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:45,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:45,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:25:45,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149981559] [2020-12-22 04:25:45,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:25:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:25:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:45,936 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 32 states. [2020-12-22 04:25:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:47,635 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2020-12-22 04:25:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:25:47,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:25:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:47,637 INFO L225 Difference]: With dead ends: 127 [2020-12-22 04:25:47,637 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 04:25:47,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 04:25:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-22 04:25:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 04:25:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-12-22 04:25:47,644 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 62 [2020-12-22 04:25:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:47,644 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-12-22 04:25:47,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:25:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-12-22 04:25:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:25:47,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:47,645 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:47,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:47,849 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2130035166, now seen corresponding path program 29 times [2020-12-22 04:25:47,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:47,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535723029] [2020-12-22 04:25:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:48,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535723029] [2020-12-22 04:25:48,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204709387] [2020-12-22 04:25:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:58,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:25:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:58,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:25:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:25:59,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:59,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:25:59,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851656081] [2020-12-22 04:25:59,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:25:59,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:25:59,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:25:59,711 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 33 states. [2020-12-22 04:26:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:01,230 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-12-22 04:26:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:26:01,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:26:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:01,232 INFO L225 Difference]: With dead ends: 129 [2020-12-22 04:26:01,232 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 04:26:01,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:26:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 04:26:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-12-22 04:26:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 04:26:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-12-22 04:26:01,239 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 64 [2020-12-22 04:26:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:01,239 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-12-22 04:26:01,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:26:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-12-22 04:26:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:26:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:01,240 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:01,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:26:01,446 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash -152123928, now seen corresponding path program 28 times [2020-12-22 04:26:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:01,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916774729] [2020-12-22 04:26:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:02,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916774729] [2020-12-22 04:26:02,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51013089] [2020-12-22 04:26:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:02,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:02,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:26:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:02,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:02,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:26:02,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770883219] [2020-12-22 04:26:02,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:26:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:02,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:26:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:26:02,530 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 33 states. [2020-12-22 04:26:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:04,319 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2020-12-22 04:26:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:26:04,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:26:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:04,324 INFO L225 Difference]: With dead ends: 131 [2020-12-22 04:26:04,324 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 04:26:04,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:26:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 04:26:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-12-22 04:26:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 04:26:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-12-22 04:26:04,331 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 64 [2020-12-22 04:26:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:04,331 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-12-22 04:26:04,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:26:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-12-22 04:26:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:26:04,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:04,332 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:04,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:04,547 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1787795463, now seen corresponding path program 30 times [2020-12-22 04:26:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657694809] [2020-12-22 04:26:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657694809] [2020-12-22 04:26:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962975724] [2020-12-22 04:26:05,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:08,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:26:08,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:26:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:09,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:09,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:26:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798097309] [2020-12-22 04:26:09,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:26:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:26:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:26:09,372 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 34 states. [2020-12-22 04:26:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:10,955 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-12-22 04:26:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:26:10,956 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:26:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:10,957 INFO L225 Difference]: With dead ends: 133 [2020-12-22 04:26:10,957 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 04:26:10,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:26:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 04:26:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-22 04:26:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 04:26:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-12-22 04:26:10,968 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 66 [2020-12-22 04:26:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:10,968 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-12-22 04:26:10,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:26:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-12-22 04:26:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:26:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:10,969 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:11,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 04:26:11,174 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:11,174 INFO L82 PathProgramCache]: Analyzing trace with hash -111863989, now seen corresponding path program 29 times [2020-12-22 04:26:11,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:11,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659837407] [2020-12-22 04:26:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:12,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659837407] [2020-12-22 04:26:12,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863620866] [2020-12-22 04:26:12,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 04:26:19,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:20,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:20,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:26:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361997208] [2020-12-22 04:26:20,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:26:20,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:26:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:26:20,095 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 34 states. [2020-12-22 04:26:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:21,959 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-22 04:26:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:26:21,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:26:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:21,961 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:26:21,961 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 04:26:21,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 30 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:26:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 04:26:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-22 04:26:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 04:26:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-12-22 04:26:21,967 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 66 [2020-12-22 04:26:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:21,968 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-12-22 04:26:21,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:26:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-12-22 04:26:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:26:21,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:21,969 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:22,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,172 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 136711340, now seen corresponding path program 31 times [2020-12-22 04:26:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:22,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067639669] [2020-12-22 04:26:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067639669] [2020-12-22 04:26:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254595759] [2020-12-22 04:26:23,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:26:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:23,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:23,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:26:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512378111] [2020-12-22 04:26:23,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:26:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:26:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:26:23,283 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 35 states. [2020-12-22 04:26:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:24,955 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2020-12-22 04:26:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:26:24,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:26:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:24,957 INFO L225 Difference]: With dead ends: 137 [2020-12-22 04:26:24,957 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 04:26:24,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:26:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 04:26:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-22 04:26:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 04:26:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-22 04:26:24,964 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 68 [2020-12-22 04:26:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:24,964 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-22 04:26:24,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:26:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-22 04:26:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:26:24,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:24,965 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:25,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 04:26:25,179 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash -76768274, now seen corresponding path program 30 times [2020-12-22 04:26:25,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:25,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019041553] [2020-12-22 04:26:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:26,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019041553] [2020-12-22 04:26:26,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685468165] [2020-12-22 04:26:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:31,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-22 04:26:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:26:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:32,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:26:32,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881100314] [2020-12-22 04:26:32,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:26:32,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:26:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:26:32,946 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 35 states. [2020-12-22 04:26:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:34,796 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2020-12-22 04:26:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:26:34,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:26:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:34,799 INFO L225 Difference]: With dead ends: 139 [2020-12-22 04:26:34,799 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 04:26:34,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:26:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 04:26:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-22 04:26:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 04:26:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-12-22 04:26:34,808 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 68 [2020-12-22 04:26:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-12-22 04:26:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:26:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-12-22 04:26:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:26:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:34,809 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:35,010 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1712198639, now seen corresponding path program 32 times [2020-12-22 04:26:35,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993559004] [2020-12-22 04:26:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993559004] [2020-12-22 04:26:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818247738] [2020-12-22 04:26:36,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:36,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:26:36,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:36,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:26:36,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031349859] [2020-12-22 04:26:36,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:26:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:36,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:26:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:36,303 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 36 states. [2020-12-22 04:26:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:38,093 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-12-22 04:26:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:26:38,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:26:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:38,095 INFO L225 Difference]: With dead ends: 141 [2020-12-22 04:26:38,095 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 04:26:38,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 04:26:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-12-22 04:26:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 04:26:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-12-22 04:26:38,102 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 70 [2020-12-22 04:26:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:38,103 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-12-22 04:26:38,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:26:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-12-22 04:26:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:26:38,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:38,104 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:38,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 04:26:38,320 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash -709524527, now seen corresponding path program 31 times [2020-12-22 04:26:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:38,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891365774] [2020-12-22 04:26:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:39,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891365774] [2020-12-22 04:26:39,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223975180] [2020-12-22 04:26:39,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:26:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:39,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:39,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:26:39,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966049763] [2020-12-22 04:26:39,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:26:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:39,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:26:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:39,605 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 36 states. [2020-12-22 04:26:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:41,807 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2020-12-22 04:26:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:26:41,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:26:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:41,809 INFO L225 Difference]: With dead ends: 143 [2020-12-22 04:26:41,809 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 04:26:41,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:26:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 04:26:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-22 04:26:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 04:26:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-12-22 04:26:41,816 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 70 [2020-12-22 04:26:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:41,816 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-12-22 04:26:41,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:26:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-12-22 04:26:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:26:41,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:41,817 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:42,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:42,031 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:42,031 INFO L82 PathProgramCache]: Analyzing trace with hash -398227914, now seen corresponding path program 33 times [2020-12-22 04:26:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:42,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902654724] [2020-12-22 04:26:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:43,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902654724] [2020-12-22 04:26:43,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110807518] [2020-12-22 04:26:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:26:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:43,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:26:43,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:44,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:44,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:26:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116119084] [2020-12-22 04:26:44,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:26:44,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:26:44,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:26:44,450 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 37 states. [2020-12-22 04:26:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:46,323 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2020-12-22 04:26:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:26:46,324 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:26:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:46,326 INFO L225 Difference]: With dead ends: 145 [2020-12-22 04:26:46,326 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 04:26:46,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:26:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 04:26:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-12-22 04:26:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-22 04:26:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-12-22 04:26:46,333 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 72 [2020-12-22 04:26:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:46,333 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-12-22 04:26:46,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:26:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-12-22 04:26:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:26:46,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:46,334 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:46,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 04:26:46,538 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1097072372, now seen corresponding path program 32 times [2020-12-22 04:26:46,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:46,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870458549] [2020-12-22 04:26:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:47,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870458549] [2020-12-22 04:26:47,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182417209] [2020-12-22 04:26:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:47,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:26:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:47,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:47,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:26:47,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928834901] [2020-12-22 04:26:47,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:26:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:47,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:26:47,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:26:47,929 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 37 states. [2020-12-22 04:26:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:50,235 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-12-22 04:26:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:26:50,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:26:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:50,237 INFO L225 Difference]: With dead ends: 147 [2020-12-22 04:26:50,237 INFO L226 Difference]: Without dead ends: 143 [2020-12-22 04:26:50,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:26:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-22 04:26:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-12-22 04:26:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 04:26:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-12-22 04:26:50,242 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 72 [2020-12-22 04:26:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:50,243 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-12-22 04:26:50,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:26:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-12-22 04:26:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:26:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:50,251 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:50,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 04:26:50,465 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash -392746213, now seen corresponding path program 34 times [2020-12-22 04:26:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:50,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118077604] [2020-12-22 04:26:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:51,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118077604] [2020-12-22 04:26:51,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127058418] [2020-12-22 04:26:51,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:51,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:51,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:26:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:26:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812206728] [2020-12-22 04:26:51,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:26:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:26:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:26:51,875 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 38 states. [2020-12-22 04:26:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:53,846 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2020-12-22 04:26:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:26:53,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-22 04:26:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:53,849 INFO L225 Difference]: With dead ends: 149 [2020-12-22 04:26:53,849 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 04:26:53,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:26:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 04:26:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-12-22 04:26:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 04:26:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-12-22 04:26:53,857 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 74 [2020-12-22 04:26:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:53,857 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-12-22 04:26:53,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:26:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-12-22 04:26:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:26:53,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:53,858 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:54,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 04:26:54,066 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 33 times [2020-12-22 04:26:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:54,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622999760] [2020-12-22 04:26:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:55,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622999760] [2020-12-22 04:26:55,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333565716] [2020-12-22 04:26:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:57,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2020-12-22 04:26:57,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:26:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:58,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:58,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:26:58,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84318026] [2020-12-22 04:26:58,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:26:58,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:26:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:26:58,105 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 38 states. [2020-12-22 04:27:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:00,459 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2020-12-22 04:27:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:27:00,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-22 04:27:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:00,461 INFO L225 Difference]: With dead ends: 151 [2020-12-22 04:27:00,461 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 04:27:00,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:27:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 04:27:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-12-22 04:27:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 04:27:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-12-22 04:27:00,468 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 74 [2020-12-22 04:27:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:00,469 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-12-22 04:27:00,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:27:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-12-22 04:27:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:27:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:00,470 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:00,674 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 580201152, now seen corresponding path program 35 times [2020-12-22 04:27:00,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706600973] [2020-12-22 04:27:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:01,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706600973] [2020-12-22 04:27:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333721719] [2020-12-22 04:27:01,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:35,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:27:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:27:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:35,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:35,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:27:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255257548] [2020-12-22 04:27:35,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:27:35,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:27:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:27:35,307 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 39 states. [2020-12-22 04:27:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:37,416 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-12-22 04:27:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:27:37,417 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:27:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:37,418 INFO L225 Difference]: With dead ends: 153 [2020-12-22 04:27:37,418 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 04:27:37,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:27:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 04:27:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-12-22 04:27:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 04:27:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-12-22 04:27:37,426 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 76 [2020-12-22 04:27:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:37,426 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-12-22 04:27:37,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:27:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-12-22 04:27:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:27:37,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:37,427 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:37,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:37,628 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 34 times [2020-12-22 04:27:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:37,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605244989] [2020-12-22 04:27:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:38,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605244989] [2020-12-22 04:27:38,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605298152] [2020-12-22 04:27:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:38,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:27:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:39,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:39,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:27:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394887527] [2020-12-22 04:27:39,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:27:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:27:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:27:39,124 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 39 states. [2020-12-22 04:27:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:41,583 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2020-12-22 04:27:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:27:41,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:27:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:41,585 INFO L225 Difference]: With dead ends: 155 [2020-12-22 04:27:41,585 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:27:41,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:27:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:27:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-12-22 04:27:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 04:27:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-12-22 04:27:41,593 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 76 [2020-12-22 04:27:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:41,593 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-12-22 04:27:41,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:27:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-12-22 04:27:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:27:41,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:41,594 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:41,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,808 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -720251611, now seen corresponding path program 36 times [2020-12-22 04:27:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:41,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079557302] [2020-12-22 04:27:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079557302] [2020-12-22 04:27:43,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458101653] [2020-12-22 04:27:43,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:46,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:27:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:27:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:46,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:46,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:27:46,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980612275] [2020-12-22 04:27:46,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:27:46,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:27:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:46,277 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 40 states. [2020-12-22 04:27:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:48,399 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2020-12-22 04:27:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:27:48,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:27:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:48,401 INFO L225 Difference]: With dead ends: 157 [2020-12-22 04:27:48,402 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 04:27:48,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 04:27:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-22 04:27:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 04:27:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2020-12-22 04:27:48,406 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 78 [2020-12-22 04:27:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:48,406 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2020-12-22 04:27:48,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:27:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2020-12-22 04:27:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:27:48,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:48,407 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:48,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-22 04:27:48,608 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1919337437, now seen corresponding path program 35 times [2020-12-22 04:27:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:48,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946925981] [2020-12-22 04:27:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:49,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946925981] [2020-12-22 04:27:49,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908679636] [2020-12-22 04:27:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:11,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 04:28:11,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 106 conjunts are in the unsatisfiable core [2020-12-22 04:28:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:12,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:12,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:28:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320862418] [2020-12-22 04:28:12,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:28:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:28:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:28:12,734 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 40 states. [2020-12-22 04:28:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:15,494 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-12-22 04:28:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:28:15,495 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:28:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:15,496 INFO L225 Difference]: With dead ends: 159 [2020-12-22 04:28:15,496 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 04:28:15,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:28:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 04:28:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-22 04:28:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 04:28:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-12-22 04:28:15,502 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 78 [2020-12-22 04:28:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:15,503 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-12-22 04:28:15,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:28:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-12-22 04:28:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:28:15,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:15,504 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:15,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:15,710 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -619873718, now seen corresponding path program 37 times [2020-12-22 04:28:15,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:15,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066768086] [2020-12-22 04:28:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066768086] [2020-12-22 04:28:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652639935] [2020-12-22 04:28:17,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:28:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:17,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:17,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:28:17,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884350566] [2020-12-22 04:28:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:28:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:28:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:28:17,407 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 41 states. [2020-12-22 04:28:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:19,649 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2020-12-22 04:28:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:28:19,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:28:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:19,650 INFO L225 Difference]: With dead ends: 161 [2020-12-22 04:28:19,651 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 04:28:19,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:28:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 04:28:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-12-22 04:28:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 04:28:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2020-12-22 04:28:19,657 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 80 [2020-12-22 04:28:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:19,657 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2020-12-22 04:28:19,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:28:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2020-12-22 04:28:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:28:19,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:19,658 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:19,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:19,862 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1992649728, now seen corresponding path program 36 times [2020-12-22 04:28:19,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:19,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052265288] [2020-12-22 04:28:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:21,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052265288] [2020-12-22 04:28:21,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707449417] [2020-12-22 04:28:21,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:24,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-22 04:28:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:28:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:25,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:25,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:28:25,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713234247] [2020-12-22 04:28:25,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:28:25,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:28:25,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:28:25,381 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 41 states. [2020-12-22 04:28:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:28,282 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2020-12-22 04:28:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:28:28,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:28:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:28,284 INFO L225 Difference]: With dead ends: 163 [2020-12-22 04:28:28,284 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 04:28:28,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:28:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 04:28:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-12-22 04:28:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 04:28:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-12-22 04:28:28,291 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 80 [2020-12-22 04:28:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:28,291 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-12-22 04:28:28,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:28:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-12-22 04:28:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:28:28,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:28,292 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:28,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:28,495 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:28,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1354000943, now seen corresponding path program 38 times [2020-12-22 04:28:28,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:28,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973486832] [2020-12-22 04:28:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat