/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/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:26:31,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:26:31,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:26:32,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:26:32,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:26:32,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:26:32,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:26:32,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:26:32,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:26:32,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:26:32,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:26:32,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:26:32,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:26:32,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:26:32,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:26:32,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:26:32,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:26:32,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:26:32,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:26:32,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:26:32,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:26:32,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:26:32,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:26:32,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:26:32,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:26:32,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:26:32,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:26:32,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:26:32,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:26:32,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:26:32,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:26:32,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:26:32,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:26:32,132 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:26:32,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:26:32,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:26:32,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:26:32,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:26:32,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:26:32,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:26:32,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:26:32,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:26:32,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:26:32,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:26:32,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:26:32,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:26:32,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:32,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:26:32,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:26:32,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:26:32,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:26:32,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:26:32,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:26:32,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:26:32,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:26:32,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:26:32,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:26:32,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:26:32,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:26:32,538 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:26:32,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-1.c [2020-12-22 04:26:32,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902d42de/5e42cb6ebbd041f28f1df6a78c58aa9d/FLAG1438c8c44 [2020-12-22 04:26:33,250 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:33,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-1.c [2020-12-22 04:26:33,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902d42de/5e42cb6ebbd041f28f1df6a78c58aa9d/FLAG1438c8c44 [2020-12-22 04:26:33,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902d42de/5e42cb6ebbd041f28f1df6a78c58aa9d [2020-12-22 04:26:33,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:33,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:33,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:33,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:33,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:33,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dcdd3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33, skipping insertion in model container [2020-12-22 04:26:33,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:33,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:33,799 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/phases_1-1.c[322,335] [2020-12-22 04:26:33,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:33,822 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:33,837 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/phases_1-1.c[322,335] [2020-12-22 04:26:33,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:33,857 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:33,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33 WrapperNode [2020-12-22 04:26:33,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:33,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:33,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:33,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:33,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:33,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:33,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:33,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:33,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (1/1) ... [2020-12-22 04:26:33,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:33,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:33,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:33,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:33,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (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 04:26:34,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:34,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:34,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:34,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:34,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:34,339 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:26:34,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:34 BoogieIcfgContainer [2020-12-22 04:26:34,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:34,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:34,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:34,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:34,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:33" (1/3) ... [2020-12-22 04:26:34,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4351d84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:34, skipping insertion in model container [2020-12-22 04:26:34,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:33" (2/3) ... [2020-12-22 04:26:34,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4351d84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:34, skipping insertion in model container [2020-12-22 04:26:34,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:34" (3/3) ... [2020-12-22 04:26:34,352 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2020-12-22 04:26:34,360 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:34,365 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:34,388 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:34,425 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:34,425 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:34,425 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:34,425 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:34,426 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:34,426 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:34,426 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:34,426 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:26:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:34,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:34,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:34,458 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:26:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180576460] [2020-12-22 04:26:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:34,769 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 04:26:34,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180576460] [2020-12-22 04:26:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:34,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:26:34,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392675225] [2020-12-22 04:26:34,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:26:34,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:26:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:26:34,798 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:26:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:34,814 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:26:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:26:34,816 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:26:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:34,826 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:34,827 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:26:34,830 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 04:26:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:26:34,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:26:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:26:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:26:34,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:26:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:34,866 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:26:34,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:26:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:26:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:34,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:34,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:34,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:34,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:26:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:34,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668101018] [2020-12-22 04:26:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:34,964 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 04:26:34,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668101018] [2020-12-22 04:26:34,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:34,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:34,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973588717] [2020-12-22 04:26:34,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:34,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:34,969 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:26:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:35,001 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-22 04:26:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:35,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:35,003 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:26:35,003 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:26:35,005 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 04:26:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:26:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:26:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:26:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:26:35,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:26:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:35,010 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:26:35,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:26:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:26:35,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:35,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:26:35,013 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-22 04:26:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459845014] [2020-12-22 04:26:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,212 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 04:26:35,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459845014] [2020-12-22 04:26:35,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752229150] [2020-12-22 04:26:35,213 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 04:26:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:26:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:35,326 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 04:26:35,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:35,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:26:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428946499] [2020-12-22 04:26:35,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:26:35,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:35,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:26:35,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:26:35,329 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-22 04:26:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:35,378 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:26:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:26:35,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:26:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:35,380 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:35,380 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:26:35,381 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 04:26:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:26:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:26:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:26:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 04:26:35,384 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-22 04:26:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:35,384 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 04:26:35,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:26:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 04:26:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:26:35,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:35,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:26:35,599 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-22 04:26:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316314110] [2020-12-22 04:26:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,712 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 04:26:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316314110] [2020-12-22 04:26:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557572047] [2020-12-22 04:26:35,713 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 04:26:35,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:35,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:26:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:35,879 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 04:26:35,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:35,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:26:35,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565732459] [2020-12-22 04:26:35,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:26:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:26:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:26:35,883 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 04:26:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:35,988 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:26:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:26:35,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:26:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:35,990 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:35,990 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:26:35,990 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 04:26:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:26:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:26:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:26:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:26:35,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-22 04:26:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:36,000 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:26:36,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:26:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:26:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:26:36,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:36,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:36,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,222 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:36,223 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-22 04:26:36,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:36,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195761223] [2020-12-22 04:26:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,436 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 04:26:36,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195761223] [2020-12-22 04:26:36,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092263021] [2020-12-22 04:26:36,437 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 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 04:26:36,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:26:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:26:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:26:36,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:26:36,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 04:26:36,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442812505] [2020-12-22 04:26:36,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:36,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:36,603 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-22 04:26:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:36,626 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 04:26:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:36,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:26:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:36,627 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:36,628 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:26:36,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:26:36,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:26:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:26:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 04:26:36,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 04:26:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:36,633 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 04:26:36,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 04:26:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:26:36,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:36,634 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:36,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-22 04:26:36,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:36,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097847900] [2020-12-22 04:26:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097847900] [2020-12-22 04:26:36,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403686536] [2020-12-22 04:26:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:26:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:37,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:26:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088409350] [2020-12-22 04:26:37,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:37,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:37,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:37,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,138 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 04:26:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:37,217 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 04:26:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:26:37,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:26:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:37,224 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:26:37,225 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:26:37,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:26:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:26:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:26:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:26:37,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 04:26:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:37,233 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:26:37,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:26:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:26:37,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:37,234 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:37,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,449 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-22 04:26:37,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:37,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714759564] [2020-12-22 04:26:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:37,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714759564] [2020-12-22 04:26:37,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961061843] [2020-12-22 04:26:37,599 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 04:26:37,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:26:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:37,750 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 04:26:37,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:37,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-22 04:26:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841655677] [2020-12-22 04:26:37,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:26:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:26:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:37,753 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-22 04:26:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:37,867 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:26:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:26:37,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:26:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:37,869 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:26:37,869 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:26:37,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:26:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:26:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:26:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 04:26:37,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-22 04:26:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:37,874 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 04:26:37,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:26:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 04:26:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:26:37,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:37,875 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:38,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:26:38,091 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-22 04:26:38,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:38,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336966988] [2020-12-22 04:26:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:38,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336966988] [2020-12-22 04:26:38,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568005840] [2020-12-22 04:26:38,215 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 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 04:26:38,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:26:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:26:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:26:38,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:38,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 04:26:38,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907762582] [2020-12-22 04:26:38,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:38,358 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-22 04:26:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:38,542 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-22 04:26:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:26:38,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:26:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:38,544 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:26:38,544 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:26:38,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:26:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-22 04:26:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:26:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:26:38,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-22 04:26:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:38,552 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:26:38,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:26:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:26:38,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:38,553 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:38,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:38,769 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-22 04:26:38,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:38,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097141517] [2020-12-22 04:26:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:38,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097141517] [2020-12-22 04:26:38,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340450747] [2020-12-22 04:26:38,967 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 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 04:26:39,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:26:39,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:39,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:39,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:26:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683680887] [2020-12-22 04:26:39,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:39,120 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-22 04:26:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:39,240 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-22 04:26:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:26:39,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:26:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:39,244 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:26:39,245 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:26:39,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:26:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:26:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:26:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:26:39,255 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-22 04:26:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:39,256 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:26:39,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:26:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:26:39,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:39,257 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:39,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:39,472 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-22 04:26:39,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40768110] [2020-12-22 04:26:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40768110] [2020-12-22 04:26:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31716391] [2020-12-22 04:26:39,667 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 04:26:39,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:26:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:26:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:39,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:39,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:26:39,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634314359] [2020-12-22 04:26:39,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:39,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:39,945 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-22 04:26:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:40,066 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 04:26:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:40,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:26:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:40,067 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:26:40,067 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:26:40,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:26:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:26:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:26:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 04:26:40,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-22 04:26:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:40,072 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 04:26:40,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 04:26:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:26:40,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:40,074 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:40,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:26:40,278 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-22 04:26:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:40,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165364587] [2020-12-22 04:26:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:40,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165364587] [2020-12-22 04:26:40,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436157266] [2020-12-22 04:26:40,466 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 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 04:26:40,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:26:40,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:40,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:26:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:40,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:40,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2020-12-22 04:26:40,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112885997] [2020-12-22 04:26:40,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:40,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:40,727 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 13 states. [2020-12-22 04:26:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:40,861 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-22 04:26:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:26:40,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-22 04:26:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:40,862 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:26:40,862 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:26:40,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:26:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:26:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:26:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:26:40,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-12-22 04:26:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:40,867 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:26:40,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:26:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:26:40,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:40,869 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:41,077 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-22 04:26:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:41,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664911001] [2020-12-22 04:26:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664911001] [2020-12-22 04:26:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398338157] [2020-12-22 04:26:41,259 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 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 04:26:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:26:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:41,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:41,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:26:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626596376] [2020-12-22 04:26:41,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:41,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:41,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:41,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:41,412 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2020-12-22 04:26:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:41,586 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 04:26:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:41,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 04:26:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:41,588 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:26:41,588 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:26:41,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:26:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:26:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:26:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 04:26:41,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-22 04:26:41,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:41,600 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 04:26:41,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 04:26:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:26:41,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:41,604 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:41,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:41,817 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:41,818 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-22 04:26:41,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:41,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162141007] [2020-12-22 04:26:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162141007] [2020-12-22 04:26:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681327718] [2020-12-22 04:26:42,029 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 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 04:26:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:26:42,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:42,203 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 04:26:42,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:42,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-22 04:26:42,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271201774] [2020-12-22 04:26:42,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:42,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:42,205 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2020-12-22 04:26:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:42,427 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-22 04:26:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:26:42,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:26:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:42,429 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:26:42,429 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:26:42,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:26:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:26:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:26:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 04:26:42,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-22 04:26:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 04:26:42,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 04:26:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:26:42,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:42,436 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:42,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:26:42,651 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-22 04:26:42,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:42,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506760717] [2020-12-22 04:26:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506760717] [2020-12-22 04:26:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446086207] [2020-12-22 04:26:42,950 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 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 04:26:43,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:26:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:26:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-22 04:26:43,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:43,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-22 04:26:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820043718] [2020-12-22 04:26:43,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:26:43,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:26:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:43,113 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2020-12-22 04:26:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:43,534 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-22 04:26:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:26:43,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:26:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:43,536 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:26:43,537 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:26:43,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:26:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:26:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-22 04:26:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:26:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 04:26:43,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-12-22 04:26:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:43,543 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 04:26:43,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:26:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 04:26:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:26:43,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:43,544 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:43,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:26:43,752 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-22 04:26:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:43,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791250511] [2020-12-22 04:26:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:44,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791250511] [2020-12-22 04:26:44,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669484321] [2020-12-22 04:26:44,057 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 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 04:26:44,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:44,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:26:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:26:44,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466822542] [2020-12-22 04:26:44,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:44,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:44,238 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 16 states. [2020-12-22 04:26:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:44,534 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-22 04:26:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:26:44,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-22 04:26:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:44,536 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:26:44,536 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:26:44,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:26:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:26:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:26:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-22 04:26:44,550 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2020-12-22 04:26:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:44,551 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-22 04:26:44,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-22 04:26:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:26:44,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:44,552 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:44,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:26:44,756 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-22 04:26:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:44,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493337409] [2020-12-22 04:26:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:45,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493337409] [2020-12-22 04:26:45,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181958524] [2020-12-22 04:26:45,043 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 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 04:26:45,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 04:26:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:26:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 19 [2020-12-22 04:26:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063264405] [2020-12-22 04:26:45,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:26:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:26:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:45,797 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 19 states. [2020-12-22 04:26:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:46,146 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-22 04:26:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:26:46,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-22 04:26:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:46,147 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:26:46,147 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:26:46,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:26:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:26:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:26:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-22 04:26:46,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2020-12-22 04:26:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:46,153 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-22 04:26:46,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:26:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-22 04:26:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:26:46,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:46,154 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:46,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:46,361 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-22 04:26:46,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842659975] [2020-12-22 04:26:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:46,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842659975] [2020-12-22 04:26:46,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980384255] [2020-12-22 04:26:46,696 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 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 04:26:46,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:26:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:26:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 120 proven. 137 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:26:47,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:47,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 26 [2020-12-22 04:26:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971380875] [2020-12-22 04:26:47,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:26:47,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:47,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:26:47,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:26:47,796 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 26 states. [2020-12-22 04:26:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:48,356 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-12-22 04:26:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:26:48,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2020-12-22 04:26:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:48,358 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:26:48,358 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:26:48,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:26:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:26:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-22 04:26:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:26:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:26:48,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-22 04:26:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:48,365 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:26:48,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:26:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:26:48,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:26:48,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:48,366 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:48,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:26:48,570 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-22 04:26:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365003888] [2020-12-22 04:26:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:48,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365003888] [2020-12-22 04:26:48,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781896285] [2020-12-22 04:26:48,955 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 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 04:26:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:26:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:49,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:49,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:26:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087902120] [2020-12-22 04:26:49,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:26:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:26:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:49,134 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-22 04:26:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:49,506 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 04:26:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:26:49,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-22 04:26:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:49,508 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:26:49,508 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:26:49,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:26:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:26:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:26:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:26:49,516 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-22 04:26:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:49,517 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:26:49,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:26:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:26:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:26:49,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:49,518 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:49,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:26:49,731 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-22 04:26:49,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:49,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257523343] [2020-12-22 04:26:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:50,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257523343] [2020-12-22 04:26:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775836911] [2020-12-22 04:26:50,138 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 04:26:50,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:50,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:50,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:26:50,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:50,388 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 04:26:50,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:50,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-22 04:26:50,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815941795] [2020-12-22 04:26:50,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:26:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:26:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:50,391 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-22 04:26:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:50,872 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-22 04:26:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:26:50,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:26:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:50,874 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:26:50,874 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:26:50,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:26:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:26:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:26:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:26:50,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-22 04:26:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:50,881 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:26:50,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:26:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:26:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:26:50,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:50,882 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:51,096 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-22 04:26:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:51,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693986158] [2020-12-22 04:26:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:51,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693986158] [2020-12-22 04:26:51,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960976517] [2020-12-22 04:26:51,478 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 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 04:26:51,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:26:51,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:26:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 04:26:52,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:52,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-22 04:26:52,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41786030] [2020-12-22 04:26:52,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:26:52,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:26:52,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:26:52,519 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-22 04:26:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:53,578 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-12-22 04:26:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:26:53,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:26:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:53,579 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:26:53,580 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:26:53,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:26:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:26:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:26:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:26:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 04:26:53,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-22 04:26:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:53,587 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 04:26:53,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:26:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 04:26:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:26:53,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:53,588 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:53,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:53,791 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-22 04:26:53,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:53,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505081196] [2020-12-22 04:26:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505081196] [2020-12-22 04:26:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110331980] [2020-12-22 04:26:54,238 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 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 04:26:54,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:26:54,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:54,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:54,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:26:54,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134946685] [2020-12-22 04:26:54,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:26:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:26:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:26:54,445 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2020-12-22 04:26:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:54,947 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-22 04:26:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:26:54,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-22 04:26:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:54,949 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:26:54,949 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:26:54,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:26:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:26:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:26:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:26:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 04:26:54,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-12-22 04:26:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:54,956 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 04:26:54,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:26:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 04:26:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:26:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:54,957 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:55,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:55,171 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-22 04:26:55,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:55,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035399211] [2020-12-22 04:26:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035399211] [2020-12-22 04:26:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848769277] [2020-12-22 04:26:55,702 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 04:26:58,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:26:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:26:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:58,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:58,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:26:58,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147128872] [2020-12-22 04:26:58,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:26:58,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:58,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:26:58,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:26:58,971 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-12-22 04:26:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:59,597 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-12-22 04:26:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:26:59,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-22 04:26:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:59,599 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:26:59,599 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:26:59,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 20 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:26:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:26:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:26:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:26:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 04:26:59,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-12-22 04:26:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,607 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 04:26:59,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:26:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 04:26:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:26:59,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,608 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:59,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:26:59,812 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:59,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-22 04:26:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:59,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777090869] [2020-12-22 04:26:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:27:00,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777090869] [2020-12-22 04:27:00,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898654143] [2020-12-22 04:27:00,387 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 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 04:27:00,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 04:27:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:00,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:27:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 229 proven. 345 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 04:27:02,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:02,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2020-12-22 04:27:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701253323] [2020-12-22 04:27:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:27:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:27:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:27:02,809 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 37 states. [2020-12-22 04:27:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:04,093 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-12-22 04:27:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:27:04,094 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2020-12-22 04:27:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:04,095 INFO L225 Difference]: With dead ends: 93 [2020-12-22 04:27:04,095 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:27:04,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:27:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:27:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-12-22 04:27:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:27:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-22 04:27:04,102 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 56 [2020-12-22 04:27:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-22 04:27:04,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:27:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-22 04:27:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:27:04,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:04,103 INFO L422 BasicCegarLoop]: trace histogram [28, 21, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:04,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:27:04,308 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2017919405, now seen corresponding path program 19 times [2020-12-22 04:27:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:04,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4193427] [2020-12-22 04:27:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4193427] [2020-12-22 04:27:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988293795] [2020-12-22 04:27:04,827 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 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 04:27:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:27:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:05,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:05,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:27:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829620391] [2020-12-22 04:27:05,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:27:05,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:27:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:05,059 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-12-22 04:27:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:05,832 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-22 04:27:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:27:05,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 62 [2020-12-22 04:27:05,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:05,834 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:27:05,834 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:27:05,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:27:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-22 04:27:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:27:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-22 04:27:05,842 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-12-22 04:27:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:05,842 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-22 04:27:05,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:27:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-22 04:27:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:27:05,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:05,844 INFO L422 BasicCegarLoop]: trace histogram [29, 22, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:06,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:06,053 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -449164170, now seen corresponding path program 20 times [2020-12-22 04:27:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:06,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407735112] [2020-12-22 04:27:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 506 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407735112] [2020-12-22 04:27:06,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432454850] [2020-12-22 04:27:06,583 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 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 04:27:06,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:27:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:07,096 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 04:27:07,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:07,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32] total 33 [2020-12-22 04:27:07,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310660130] [2020-12-22 04:27:07,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:27:07,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:07,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:27:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:27:07,098 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 33 states. [2020-12-22 04:27:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:08,157 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-12-22 04:27:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:27:08,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:27:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:08,159 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:27:08,159 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:27:08,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:27:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:27:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 04:27:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:27:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-22 04:27:08,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-12-22 04:27:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:08,166 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-22 04:27:08,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:27:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-22 04:27:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:27:08,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:08,167 INFO L422 BasicCegarLoop]: trace histogram [30, 23, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:08,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:27:08,381 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -408904231, now seen corresponding path program 21 times [2020-12-22 04:27:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386473627] [2020-12-22 04:27:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 552 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386473627] [2020-12-22 04:27:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328971956] [2020-12-22 04:27:09,000 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 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 04:27:09,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:27:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:27:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 345 proven. 49 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-22 04:27:10,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:10,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-22 04:27:10,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884712896] [2020-12-22 04:27:10,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:27:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:27:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:27:10,842 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 34 states. [2020-12-22 04:27:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:13,108 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-12-22 04:27:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:27:13,109 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:27:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:13,110 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:27:13,110 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:27:13,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:27:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:27:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:27:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:27:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:27:13,117 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 66 [2020-12-22 04:27:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:27:13,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:27:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:27:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:27:13,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:13,118 INFO L422 BasicCegarLoop]: trace histogram [32, 24, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:13,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:13,322 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1599458785, now seen corresponding path program 22 times [2020-12-22 04:27:13,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:13,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550688101] [2020-12-22 04:27:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:13,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550688101] [2020-12-22 04:27:13,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947582948] [2020-12-22 04:27:13,968 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 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 04:27:14,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:27:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:14,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:14,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:27:14,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903512691] [2020-12-22 04:27:14,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:27:14,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:27:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:14,221 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 28 states. [2020-12-22 04:27:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:15,208 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-12-22 04:27:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:27:15,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-12-22 04:27:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:15,210 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:27:15,210 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:27:15,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:27:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:27:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:27:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:27:15,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-22 04:27:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:15,217 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:27:15,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:27:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:27:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:27:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:15,218 INFO L422 BasicCegarLoop]: trace histogram [33, 25, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:15,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:27:15,432 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -888911612, now seen corresponding path program 23 times [2020-12-22 04:27:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:15,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857330664] [2020-12-22 04:27:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:16,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857330664] [2020-12-22 04:27:16,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862916766] [2020-12-22 04:27:16,196 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 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 04:27:23,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-22 04:27:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:23,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 04:27:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:24,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:24,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:27:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850168786] [2020-12-22 04:27:24,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:27:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:27:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:24,530 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 29 states. [2020-12-22 04:27:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:25,607 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-12-22 04:27:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:27:25,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-12-22 04:27:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:25,609 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:27:25,609 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:27:25,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 29 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:27:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 04:27:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 04:27:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-22 04:27:25,614 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-12-22 04:27:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:25,615 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-22 04:27:25,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:27:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-22 04:27:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:27:25,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:25,616 INFO L422 BasicCegarLoop]: trace histogram [34, 26, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:25,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:27:25,821 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash 83920743, now seen corresponding path program 24 times [2020-12-22 04:27:25,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:25,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673042672] [2020-12-22 04:27:25,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 702 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:26,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673042672] [2020-12-22 04:27:26,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507917336] [2020-12-22 04:27:26,601 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 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 04:27:28,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-22 04:27:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:27:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:28,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 36] total 37 [2020-12-22 04:27:28,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487528228] [2020-12-22 04:27:28,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:27:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:27:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:27:28,802 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 37 states. [2020-12-22 04:27:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:30,371 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-12-22 04:27:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:27:30,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 74 [2020-12-22 04:27:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:30,373 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:27:30,373 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:27:30,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:27:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:27:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 04:27:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:27:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 04:27:30,381 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-12-22 04:27:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:30,382 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 04:27:30,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:27:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 04:27:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:27:30,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:30,383 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:30,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:27:30,588 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-22 04:27:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754893546] [2020-12-22 04:27:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754893546] [2020-12-22 04:27:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954945154] [2020-12-22 04:27:31,378 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 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 04:27:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:27:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:31,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:31,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:27:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025156194] [2020-12-22 04:27:31,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:27:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:27:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:31,667 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-22 04:27:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:32,844 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-22 04:27:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:27:32,845 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-22 04:27:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:32,846 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:27:32,846 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:27:32,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:27:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:27:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:27:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 04:27:32,854 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-22 04:27:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:32,854 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 04:27:32,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:27:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 04:27:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:27:32,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:32,855 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:33,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:33,069 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-22 04:27:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:33,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315726411] [2020-12-22 04:27:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:34,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315726411] [2020-12-22 04:27:34,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146623885] [2020-12-22 04:27:34,016 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 04:27:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:27:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:34,617 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 04:27:34,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:34,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-22 04:27:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042453792] [2020-12-22 04:27:34,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:27:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:27:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:34,620 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-22 04:27:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:36,319 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-22 04:27:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:27:36,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:27:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:36,321 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:27:36,322 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:27:36,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:27:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:27:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:27:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-22 04:27:36,330 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-22 04:27:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:36,330 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-22 04:27:36,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:27:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-22 04:27:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:27:36,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:36,331 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:36,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:27:36,547 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-22 04:27:36,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:36,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757146964] [2020-12-22 04:27:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:37,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757146964] [2020-12-22 04:27:37,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465334197] [2020-12-22 04:27:37,480 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 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 04:27:37,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:27:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:27:37,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 493 proven. 64 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-22 04:27:39,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:39,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-22 04:27:39,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453312733] [2020-12-22 04:27:39,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:27:39,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:27:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:27:39,375 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-22 04:27:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:44,703 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-22 04:27:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:27:44,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:27:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:44,704 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:27:44,704 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:27:44,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=281, Invalid=2169, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:27:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:27:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-22 04:27:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:27:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 04:27:44,713 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-22 04:27:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:44,713 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 04:27:44,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:27:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 04:27:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:27:44,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:44,714 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:44,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:44,917 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-22 04:27:44,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:44,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038836783] [2020-12-22 04:27:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038836783] [2020-12-22 04:27:45,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848398887] [2020-12-22 04:27:45,905 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 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 04:27:45,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:45,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:45,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:27:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:46,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:46,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:27:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353254713] [2020-12-22 04:27:46,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:27:46,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:27:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:27:46,210 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-22 04:27:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:47,799 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-22 04:27:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:27:47,800 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-22 04:27:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:47,801 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:27:47,801 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:27:47,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:27:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:27:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 04:27:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:27:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 04:27:47,809 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-22 04:27:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:47,809 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 04:27:47,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:27:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 04:27:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:27:47,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:47,810 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:48,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:27:48,016 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-22 04:27:48,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:48,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649577201] [2020-12-22 04:27:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649577201] [2020-12-22 04:27:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18356656] [2020-12-22 04:27:49,074 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 04:28:03,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 04:28:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:28:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 324 proven. 1260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:28:04,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:04,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38] total 39 [2020-12-22 04:28:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061094165] [2020-12-22 04:28:04,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:28:04,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:28:04,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:28:04,368 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 39 states. [2020-12-22 04:28:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:06,304 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-22 04:28:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:28:06,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-12-22 04:28:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:06,306 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:28:06,306 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:28:06,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:28:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:28:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 04:28:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:28:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 04:28:06,313 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-22 04:28:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:06,313 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 04:28:06,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:28:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 04:28:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:28:06,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:06,314 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:06,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:28:06,515 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-22 04:28:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:06,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100003269] [2020-12-22 04:28:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:28:07,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100003269] [2020-12-22 04:28:07,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480094204] [2020-12-22 04:28:07,719 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 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 04:28:16,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-22 04:28:16,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:28:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 657 proven. 661 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 04:28:19,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:19,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24] total 53 [2020-12-22 04:28:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861133978] [2020-12-22 04:28:19,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:28:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:28:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2207, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:28:19,738 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 53 states. [2020-12-22 04:28:25,735 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-22 04:28:27,920 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:28:29,079 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:28:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:30,122 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-12-22 04:28:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:28:30,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 88 [2020-12-22 04:28:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:30,125 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:28:30,125 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 04:28:30,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=691, Invalid=3215, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:28:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 04:28:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-12-22 04:28:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:28:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-22 04:28:30,134 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-12-22 04:28:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:30,134 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-22 04:28:30,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:28:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-22 04:28:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:28:30,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:30,135 INFO L422 BasicCegarLoop]: trace histogram [44, 33, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:30,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:28:30,340 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1993007499, now seen corresponding path program 31 times [2020-12-22 04:28:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:30,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348811438] [2020-12-22 04:28:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:31,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348811438] [2020-12-22 04:28:31,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912655292] [2020-12-22 04:28:31,641 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 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 04:28:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:28:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:31,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:31,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:28:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100573966] [2020-12-22 04:28:31,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:28:31,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:28:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:31,970 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 37 states. [2020-12-22 04:28:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:34,011 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-22 04:28:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:28:34,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2020-12-22 04:28:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:34,013 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:28:34,013 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:28:34,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:28:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 04:28:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:28:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-22 04:28:34,020 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-12-22 04:28:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:34,020 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-22 04:28:34,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:28:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-22 04:28:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:28:34,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:34,021 INFO L422 BasicCegarLoop]: trace histogram [45, 34, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:34,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:28:34,222 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2146245714, now seen corresponding path program 32 times [2020-12-22 04:28:34,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:34,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210576822] [2020-12-22 04:28:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 1190 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210576822] [2020-12-22 04:28:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484703770] [2020-12-22 04:28:35,599 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 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 04:28:35,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 04:28:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:36,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:36,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 48] total 49 [2020-12-22 04:28:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66320863] [2020-12-22 04:28:36,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:28:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:28:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:28:36,689 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 49 states. [2020-12-22 04:28:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:39,532 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-12-22 04:28:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:28:39,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:28:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:39,534 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:28:39,534 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:28:39,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:28:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:28:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-22 04:28:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:28:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-22 04:28:39,544 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-12-22 04:28:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:39,544 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-22 04:28:39,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:28:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-22 04:28:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:28:39,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:39,545 INFO L422 BasicCegarLoop]: trace histogram [46, 35, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:39,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:28:39,759 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1466099985, now seen corresponding path program 33 times [2020-12-22 04:28:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:39,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110049127] [2020-12-22 04:28:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 1260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110049127] [2020-12-22 04:28:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029415669] [2020-12-22 04:28:41,107 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 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 04:28:41,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:28:41,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:28:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 805 proven. 121 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-22 04:28:43,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:43,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-22 04:28:43,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385592754] [2020-12-22 04:28:43,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:28:43,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:28:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2068, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:28:43,144 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 50 states. [2020-12-22 04:28:46,950 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:28:49,283 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:28:52,250 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2020-12-22 04:28:54,547 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:28:56,179 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:28:57,670 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-22 04:28:59,105 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:28:59,931 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2020-12-22 04:29:00,826 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2020-12-22 04:29:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:02,097 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-12-22 04:29:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:29:02,098 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-22 04:29:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:02,098 INFO L225 Difference]: With dead ends: 133 [2020-12-22 04:29:02,098 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:29:02,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=560, Invalid=3222, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:29:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:29:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-12-22 04:29:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:29:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 04:29:02,106 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 98 [2020-12-22 04:29:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:02,107 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 04:29:02,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:29:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 04:29:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:29:02,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:02,108 INFO L422 BasicCegarLoop]: trace histogram [48, 36, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:02,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:29:02,311 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 144826137, now seen corresponding path program 34 times [2020-12-22 04:29:02,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:02,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173032501] [2020-12-22 04:29:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:29:03,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173032501] [2020-12-22 04:29:03,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215411295] [2020-12-22 04:29:03,817 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 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 04:29:03,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:29:03,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:29:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:29:04,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:04,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:29:04,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590492440] [2020-12-22 04:29:04,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:29:04,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:29:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:29:04,194 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 40 states. [2020-12-22 04:29:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:06,827 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2020-12-22 04:29:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:29:06,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2020-12-22 04:29:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:06,829 INFO L225 Difference]: With dead ends: 136 [2020-12-22 04:29:06,830 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:29:06,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:29:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:29:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 04:29:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:29:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-22 04:29:06,844 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-22 04:29:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:06,845 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-22 04:29:06,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:29:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-22 04:29:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:29:06,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:06,846 INFO L422 BasicCegarLoop]: trace histogram [49, 37, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:07,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:29:07,060 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash 404950588, now seen corresponding path program 35 times [2020-12-22 04:29:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:07,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060136221] [2020-12-22 04:29:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:29:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060136221] [2020-12-22 04:29:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419668539] [2020-12-22 04:29:08,826 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 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 04:29:42,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-22 04:29:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:42,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-22 04:29:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:29:44,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:44,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:29:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273101271] [2020-12-22 04:29:44,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:29:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:29:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:44,651 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 41 states. [2020-12-22 04:29:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:47,453 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-12-22 04:29:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:29:47,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 104 [2020-12-22 04:29:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:47,454 INFO L225 Difference]: With dead ends: 138 [2020-12-22 04:29:47,454 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:29:47,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 67 SyntacticMatches, 38 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:29:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-22 04:29:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 04:29:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-22 04:29:47,466 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2020-12-22 04:29:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:47,466 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-22 04:29:47,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:29:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-22 04:29:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:29:47,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:47,467 INFO L422 BasicCegarLoop]: trace histogram [50, 38, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:47,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:29:47,668 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1276444831, now seen corresponding path program 36 times [2020-12-22 04:29:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:47,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112243093] [2020-12-22 04:29:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 1482 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:29:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112243093] [2020-12-22 04:29:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176962099] [2020-12-22 04:29:49,438 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 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 04:29:59,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2020-12-22 04:29:59,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 112 conjunts are in the unsatisfiable core [2020-12-22 04:29:59,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:01,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:01,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 52] total 53 [2020-12-22 04:30:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386840705] [2020-12-22 04:30:01,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:30:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:30:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2614, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:30:01,073 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 53 states. [2020-12-22 04:30:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:04,945 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-12-22 04:30:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:30:04,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 106 [2020-12-22 04:30:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:04,947 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:30:04,947 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:30:04,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=142, Invalid=2614, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:30:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:30:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-22 04:30:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:30:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 04:30:04,955 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 106 [2020-12-22 04:30:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:04,955 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 04:30:04,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:30:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 04:30:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:30:04,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:04,956 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:05,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:05,162 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-22 04:30:05,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:05,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693218386] [2020-12-22 04:30:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:07,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693218386] [2020-12-22 04:30:07,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88396492] [2020-12-22 04:30:07,009 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 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 04:30:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:30:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:07,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:07,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:30:07,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24863596] [2020-12-22 04:30:07,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:30:07,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:30:07,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:30:07,411 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-22 04:30:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:10,520 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-22 04:30:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:30:10,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-22 04:30:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:10,523 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:30:10,523 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:30:10,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:30:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:30:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-22 04:30:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:30:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-22 04:30:10,534 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-22 04:30:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:10,534 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-22 04:30:10,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:30:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-22 04:30:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:30:10,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:10,535 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:10,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:10,735 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:10,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-22 04:30:10,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:10,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086491214] [2020-12-22 04:30:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086491214] [2020-12-22 04:30:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168286666] [2020-12-22 04:30:12,691 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 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 04:30:12,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:30:12,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:30:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:14,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:14,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-22 04:30:14,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023534652] [2020-12-22 04:30:14,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:30:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:30:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:30:14,171 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2020-12-22 04:30:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:18,315 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-12-22 04:30:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:30:18,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:30:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:18,319 INFO L225 Difference]: With dead ends: 144 [2020-12-22 04:30:18,319 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:30:18,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:30:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:30:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-22 04:30:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:30:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 04:30:18,332 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2020-12-22 04:30:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:18,334 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 04:30:18,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:30:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 04:30:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:30:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:18,335 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:18,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:30:18,551 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2020-12-22 04:30:18,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:18,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122675134] [2020-12-22 04:30:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:20,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122675134] [2020-12-22 04:30:20,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610510404] [2020-12-22 04:30:20,518 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 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 04:30:21,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-22 04:30:21,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:30:21,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-22 04:30:24,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:24,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-22 04:30:24,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697130021] [2020-12-22 04:30:24,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:30:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:30:24,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:30:24,075 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2020-12-22 04:30:29,740 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:30:31,299 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-22 04:30:33,271 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:30:36,332 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:30:40,244 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2020-12-22 04:30:45,209 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 12 [2020-12-22 04:30:49,917 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12