/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/simple_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:51:53,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:51:53,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:51:53,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:51:53,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:51:53,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:51:53,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:51:53,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:51:53,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:51:53,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:51:53,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:51:53,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:51:53,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:51:53,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:51:53,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:51:53,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:51:53,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:51:53,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:51:53,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:51:53,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:51:53,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:51:53,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:51:53,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:51:53,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:51:53,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:51:53,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:51:53,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:51:53,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:51:53,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:51:53,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:51:53,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:51:53,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:51:53,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:51:53,353 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:51:53,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:51:53,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:51:53,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:51:53,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:51:53,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:51:53,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:51:53,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:51:53,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:51:53,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:51:53,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:51:53,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:51:53,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:51:53,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:53,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:51:53,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:51:53,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:51:53,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:51:53,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:51:53,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:51:53,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:51:53,358 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:51:53,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:51:53,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:51:53,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:51:53,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:51:53,771 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:51:53,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_1-2.c [2020-12-23 06:51:53,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41272d9a8/da5e8f708d6f45fbb98b6aa2d34ba186/FLAG22dd6df7d [2020-12-23 06:51:54,511 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:51:54,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-2.c [2020-12-23 06:51:54,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41272d9a8/da5e8f708d6f45fbb98b6aa2d34ba186/FLAG22dd6df7d [2020-12-23 06:51:54,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/41272d9a8/da5e8f708d6f45fbb98b6aa2d34ba186 [2020-12-23 06:51:54,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:51:54,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:51:54,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:54,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:51:54,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:51:54,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:54" (1/1) ... [2020-12-23 06:51:54,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89b287f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:54, skipping insertion in model container [2020-12-23 06:51:54,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:54" (1/1) ... [2020-12-23 06:51:54,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:51:54,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:51:55,101 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-2.c[322,335] [2020-12-23 06:51:55,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:55,122 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:51:55,136 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-2.c[322,335] [2020-12-23 06:51:55,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:55,154 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:51:55,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55 WrapperNode [2020-12-23 06:51:55,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:55,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:55,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:51:55,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:51:55,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:55,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:51:55,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:51:55,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:51:55,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... [2020-12-23 06:51:55,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:51:55,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:51:55,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:51:55,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:51:55,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:51:55,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:51:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:51:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:51:55,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:51:55,612 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:51:55,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:55 BoogieIcfgContainer [2020-12-23 06:51:55,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:51:55,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:51:55,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:51:55,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:51:55,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:51:54" (1/3) ... [2020-12-23 06:51:55,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535a6ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:55, skipping insertion in model container [2020-12-23 06:51:55,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:55" (2/3) ... [2020-12-23 06:51:55,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535a6ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:55, skipping insertion in model container [2020-12-23 06:51:55,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:55" (3/3) ... [2020-12-23 06:51:55,637 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-2.c [2020-12-23 06:51:55,648 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:51:55,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:51:55,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:51:55,712 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:51:55,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:51:55,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:51:55,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:51:55,713 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:51:55,713 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:51:55,713 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:51:55,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:51:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:51:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:55,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:55,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:55,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:51:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:55,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114938001] [2020-12-23 06:51:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114938001] [2020-12-23 06:51:56,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:56,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:56,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003262650] [2020-12-23 06:51:56,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:56,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:56,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:56,124 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-23 06:51:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:56,152 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 06:51:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:56,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:51:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:56,164 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:56,164 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:51:56,168 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 [2020-12-23 06:51:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:51:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:51:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:51:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:51:56,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:51:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:56,205 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:51:56,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:51:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:51:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:56,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:56,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:51:56,207 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:51:56,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:56,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461227138] [2020-12-23 06:51:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461227138] [2020-12-23 06:51:56,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104571743] [2020-12-23 06:51:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:51:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:56,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:51:56,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948304225] [2020-12-23 06:51:56,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:51:56,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:51:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:56,478 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 06:51:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:56,494 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:51:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:51:56,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:51:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:56,496 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:51:56,496 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:51:56,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:51:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:51:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:51:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:51:56,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:51:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:56,501 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:51:56,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:51:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:51:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:51:56,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:56,502 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:56,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:51:56,718 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:56,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-23 06:51:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:56,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692701702] [2020-12-23 06:51:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692701702] [2020-12-23 06:51:56,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227808764] [2020-12-23 06:51:56,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:56,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:51:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:56,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:51:57,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761994659] [2020-12-23 06:51:57,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:51:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:51:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:51:57,003 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-23 06:51:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:57,045 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 06:51:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:51:57,048 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 06:51:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:57,048 INFO L225 Difference]: With dead ends: 14 [2020-12-23 06:51:57,048 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:51:57,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:51:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:51:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:51:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:51:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:51:57,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 06:51:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:57,056 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:51:57,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:51:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:51:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:51:57,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:57,057 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:57,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:57,272 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:57,274 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-23 06:51:57,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:57,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776821296] [2020-12-23 06:51:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:57,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776821296] [2020-12-23 06:51:57,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292282999] [2020-12-23 06:51:57,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:57,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:51:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:51:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:57,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:57,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:51:57,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670993923] [2020-12-23 06:51:57,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:57,462 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-23 06:51:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:57,490 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:51:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:51:57,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 06:51:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:57,491 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:51:57,492 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:51:57,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:51:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:51:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:51:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:51:57,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-23 06:51:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:57,496 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:51:57,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:51:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:51:57,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:57,498 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:57,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:57,712 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-23 06:51:57,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:57,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038892936] [2020-12-23 06:51:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:57,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038892936] [2020-12-23 06:51:57,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257632587] [2020-12-23 06:51:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:57,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:51:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:57,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:57,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:51:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581590685] [2020-12-23 06:51:57,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:51:57,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:51:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:57,969 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-23 06:51:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:58,008 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:51:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:58,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 06:51:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:58,009 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:51:58,009 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:51:58,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:51:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:51:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:51:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:51:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 06:51:58,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-23 06:51:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:58,014 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 06:51:58,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:51:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 06:51:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:51:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:58,015 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:58,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:58,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-23 06:51:58,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:58,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118357039] [2020-12-23 06:51:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118357039] [2020-12-23 06:51:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918128605] [2020-12-23 06:51:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:58,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:51:58,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:58,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:51:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:51:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701230410] [2020-12-23 06:51:58,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:58,477 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-23 06:51:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:58,518 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-23 06:51:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:51:58,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 06:51:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:58,519 INFO L225 Difference]: With dead ends: 17 [2020-12-23 06:51:58,519 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:51:58,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:51:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:51:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:51:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:51:58,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-23 06:51:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:58,524 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:51:58,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:51:58,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:51:58,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:58,525 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:58,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:51:58,731 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:58,732 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-23 06:51:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480567258] [2020-12-23 06:51:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480567258] [2020-12-23 06:51:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470761412] [2020-12-23 06:51:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:58,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:51:58,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:51:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:59,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:59,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:51:59,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568177459] [2020-12-23 06:51:59,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:59,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:59,041 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-23 06:51:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:59,090 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:51:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:59,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-23 06:51:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:59,091 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:59,091 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:51:59,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:51:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:51:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:51:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:51:59,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-23 06:51:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:59,096 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:51:59,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:51:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:51:59,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:59,097 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:59,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:59,311 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2020-12-23 06:51:59,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:59,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325337273] [2020-12-23 06:51:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325337273] [2020-12-23 06:51:59,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688274761] [2020-12-23 06:51:59,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:51:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:51:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:59,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:59,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:59,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315488720] [2020-12-23 06:51:59,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:59,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:59,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:59,530 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-23 06:51:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:59,587 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 06:51:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:59,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 06:51:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:59,588 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:51:59,588 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:51:59,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:51:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:51:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:51:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:51:59,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-23 06:51:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:59,593 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:51:59,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:51:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:51:59,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:59,594 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:59,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:59,808 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2020-12-23 06:51:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:59,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948433294] [2020-12-23 06:51:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948433294] [2020-12-23 06:52:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304116480] [2020-12-23 06:52:00,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:00,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:00,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:52:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:00,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:52:00,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318408113] [2020-12-23 06:52:00,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:52:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:52:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:00,107 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-23 06:52:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:00,190 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:52:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:52:00,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 06:52:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:00,192 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:52:00,192 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:52:00,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:52:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 06:52:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:52:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 06:52:00,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-23 06:52:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:00,196 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 06:52:00,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:52:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 06:52:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:52:00,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:00,197 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:00,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:52:00,411 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2020-12-23 06:52:00,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:00,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550875540] [2020-12-23 06:52:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:00,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550875540] [2020-12-23 06:52:00,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209956944] [2020-12-23 06:52:00,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:00,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:52:00,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:52:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:00,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:00,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:00,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2020-12-23 06:52:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530419320] [2020-12-23 06:52:00,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:52:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:52:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:00,799 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-12-23 06:52:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:00,897 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-23 06:52:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:52:00,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-12-23 06:52:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:00,898 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:52:00,899 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:52:00,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:52:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:52:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:52:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:52:00,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-23 06:52:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:00,904 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:52:00,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:52:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:52:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:52:00,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:00,904 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:01,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:01,108 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2020-12-23 06:52:01,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:01,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119166731] [2020-12-23 06:52:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:01,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119166731] [2020-12-23 06:52:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671683230] [2020-12-23 06:52:01,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:01,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:01,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:52:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:01,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:01,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:52:01,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762638626] [2020-12-23 06:52:01,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:52:01,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:52:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:01,467 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-23 06:52:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:01,566 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:52:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:52:01,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-23 06:52:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:01,567 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:52:01,567 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:52:01,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:52:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:52:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:52:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 06:52:01,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-23 06:52:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:01,571 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 06:52:01,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:52:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 06:52:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:52:01,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:01,572 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:01,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:01,786 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2020-12-23 06:52:01,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:01,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443974419] [2020-12-23 06:52:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443974419] [2020-12-23 06:52:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211526844] [2020-12-23 06:52:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:02,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:52:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:52:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:02,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:02,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:52:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089745551] [2020-12-23 06:52:02,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:52:02,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:02,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:52:02,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:52:02,360 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-23 06:52:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:02,466 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 06:52:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:52:02,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 06:52:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:02,468 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:52:02,468 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:52:02,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:52:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:52:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:52:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:52:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:52:02,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-23 06:52:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:02,473 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:52:02,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:52:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:52:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:52:02,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:02,473 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:02,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:52:02,677 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2020-12-23 06:52:02,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:02,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275244251] [2020-12-23 06:52:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:02,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275244251] [2020-12-23 06:52:02,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773762168] [2020-12-23 06:52:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:03,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:52:03,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:52:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:03,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:03,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:52:03,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009855015] [2020-12-23 06:52:03,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:52:03,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:52:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:52:03,182 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-23 06:52:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:03,311 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:52:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:52:03,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-23 06:52:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:03,312 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:52:03,312 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:52:03,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:52:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:52:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 06:52:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:52:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 06:52:03,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 06:52:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:03,317 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 06:52:03,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:52:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 06:52:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:52:03,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:03,318 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:03,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:52:03,522 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2020-12-23 06:52:03,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:03,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391223411] [2020-12-23 06:52:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391223411] [2020-12-23 06:52:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564436860] [2020-12-23 06:52:03,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:52:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:03,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:03,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:52:03,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188086089] [2020-12-23 06:52:03,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:52:03,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:52:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:03,866 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-23 06:52:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:04,020 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 06:52:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:52:04,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-23 06:52:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:04,022 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:52:04,022 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:52:04,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:52:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:52:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:52:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:52:04,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-23 06:52:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:04,026 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:52:04,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:52:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:52:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:52:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:04,027 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:04,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:52:04,241 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2020-12-23 06:52:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111072068] [2020-12-23 06:52:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:04,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111072068] [2020-12-23 06:52:04,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841346331] [2020-12-23 06:52:04,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:04,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:52:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:04,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:04,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:52:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227583146] [2020-12-23 06:52:04,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:52:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:04,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:52:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:04,647 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-23 06:52:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:04,801 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:52:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:52:04,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-23 06:52:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:04,802 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:52:04,802 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:52:04,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:52:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:52:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:52:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 06:52:04,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-23 06:52:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:04,807 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 06:52:04,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:52:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 06:52:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:52:04,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:04,808 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:05,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:05,022 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2020-12-23 06:52:05,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:05,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853835931] [2020-12-23 06:52:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:05,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853835931] [2020-12-23 06:52:05,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813008684] [2020-12-23 06:52:05,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:05,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 06:52:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:52:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:05,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:05,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:52:05,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785355911] [2020-12-23 06:52:05,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:52:05,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:52:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:52:05,576 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-23 06:52:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:05,785 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 06:52:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:52:05,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 06:52:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:05,786 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:52:05,786 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:52:05,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:52:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:52:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:52:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:52:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:52:05,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-23 06:52:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:05,791 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:52:05,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:52:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:52:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:52:05,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:05,792 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:05,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:52:05,997 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2020-12-23 06:52:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:05,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740730649] [2020-12-23 06:52:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740730649] [2020-12-23 06:52:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325831204] [2020-12-23 06:52:06,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:06,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:06,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:52:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:06,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:06,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:52:06,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055081793] [2020-12-23 06:52:06,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:52:06,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:06,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:52:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:52:06,449 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-23 06:52:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:06,640 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:52:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:52:06,641 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-23 06:52:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:06,641 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:52:06,642 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:52:06,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:52:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:52:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 06:52:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:52:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 06:52:06,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-23 06:52:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:06,646 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 06:52:06,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:52:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 06:52:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:52:06,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:06,647 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:06,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:52:06,863 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2020-12-23 06:52:06,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:06,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400332163] [2020-12-23 06:52:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:07,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400332163] [2020-12-23 06:52:07,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147094152] [2020-12-23 06:52:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:07,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:52:07,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:07,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:52:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:08,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:52:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106495310] [2020-12-23 06:52:08,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:52:08,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:52:08,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:52:08,176 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-23 06:52:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:08,437 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-23 06:52:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:52:08,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-23 06:52:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:08,439 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:52:08,439 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:52:08,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:52:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:52:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:52:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:52:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:52:08,444 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-23 06:52:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:08,444 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:52:08,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:52:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:52:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:52:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:08,445 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:08,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:52:08,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2020-12-23 06:52:08,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:08,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111612517] [2020-12-23 06:52:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111612517] [2020-12-23 06:52:09,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021174907] [2020-12-23 06:52:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:09,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:52:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:52:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:09,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:09,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:52:09,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285689563] [2020-12-23 06:52:09,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:52:09,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:52:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:52:09,703 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-23 06:52:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:09,938 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:52:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:52:09,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-23 06:52:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:09,939 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:52:09,939 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:52:09,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:52:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:52:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 06:52:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:52:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 06:52:09,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-23 06:52:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:09,943 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 06:52:09,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:52:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 06:52:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:52:09,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:09,944 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:10,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:10,148 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2020-12-23 06:52:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:10,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472328530] [2020-12-23 06:52:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472328530] [2020-12-23 06:52:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423047300] [2020-12-23 06:52:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:52:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:10,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:52:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019310542] [2020-12-23 06:52:10,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:52:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:52:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:52:10,700 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-23 06:52:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:10,999 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 06:52:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:52:10,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-23 06:52:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:11,000 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:52:11,000 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:52:11,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:52:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:52:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:52:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:52:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:52:11,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-23 06:52:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:11,005 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:52:11,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:52:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:52:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:52:11,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:11,005 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:11,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:11,219 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2020-12-23 06:52:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985084347] [2020-12-23 06:52:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:11,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985084347] [2020-12-23 06:52:11,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698625764] [2020-12-23 06:52:11,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:11,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:52:11,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:11,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:11,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:52:11,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466759188] [2020-12-23 06:52:11,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:52:11,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:11,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:52:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:52:11,841 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-23 06:52:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:12,180 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:52:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:52:12,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-23 06:52:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:12,181 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:52:12,181 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:52:12,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:52:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:52:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:52:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:52:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 06:52:12,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-23 06:52:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:12,186 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 06:52:12,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:52:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 06:52:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:52:12,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:12,187 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:12,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:52:12,401 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2020-12-23 06:52:12,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:12,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802844126] [2020-12-23 06:52:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:12,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802844126] [2020-12-23 06:52:12,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853572094] [2020-12-23 06:52:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:13,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:52:13,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:13,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:52:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:13,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:13,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:52:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469876498] [2020-12-23 06:52:13,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:52:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:52:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:52:13,441 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-23 06:52:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:13,829 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-23 06:52:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:52:13,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-23 06:52:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:13,830 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:52:13,831 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:52:13,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:52:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:52:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:52:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:52:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:52:13,835 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-23 06:52:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:13,835 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:52:13,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:52:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:52:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:52:13,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:13,836 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:14,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:52:14,040 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2020-12-23 06:52:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:14,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307102458] [2020-12-23 06:52:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307102458] [2020-12-23 06:52:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624884558] [2020-12-23 06:52:14,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:14,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:14,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:52:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:14,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:14,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:52:14,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317151157] [2020-12-23 06:52:14,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:52:14,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:14,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:52:14,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:52:14,710 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-23 06:52:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:15,113 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:52:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:52:15,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 06:52:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:15,114 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:52:15,114 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:52:15,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:52:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:52:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:52:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:52:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 06:52:15,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-23 06:52:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:15,125 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 06:52:15,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:52:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 06:52:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:52:15,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:15,127 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:15,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:15,341 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2020-12-23 06:52:15,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:15,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500941181] [2020-12-23 06:52:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500941181] [2020-12-23 06:52:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180915264] [2020-12-23 06:52:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:18,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:52:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:18,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:52:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:19,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:19,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:52:19,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896832131] [2020-12-23 06:52:19,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:52:19,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:52:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:52:19,302 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-23 06:52:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:19,767 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-23 06:52:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:52:19,768 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-23 06:52:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:19,768 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:52:19,768 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:52:19,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:52:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:52:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:52:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:52:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:52:19,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-23 06:52:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:19,773 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:52:19,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:52:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:52:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:52:19,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:19,774 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:19,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:52:19,979 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2020-12-23 06:52:19,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:19,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773576543] [2020-12-23 06:52:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773576543] [2020-12-23 06:52:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826246300] [2020-12-23 06:52:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:21,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:52:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:52:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:21,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:21,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:21,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2020-12-23 06:52:21,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892326360] [2020-12-23 06:52:21,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:52:21,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:52:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:21,764 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 29 states. [2020-12-23 06:52:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:22,232 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:52:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:52:22,233 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2020-12-23 06:52:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:22,233 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:52:22,233 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:52:22,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:52:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 06:52:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:52:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 06:52:22,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-23 06:52:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:22,238 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 06:52:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:52:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 06:52:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:52:22,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:22,239 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:22,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:22,443 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2020-12-23 06:52:22,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:22,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25276317] [2020-12-23 06:52:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:23,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25276317] [2020-12-23 06:52:23,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135719819] [2020-12-23 06:52:23,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:23,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:52:23,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:23,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:23,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:52:23,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770282673] [2020-12-23 06:52:23,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:52:23,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:23,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:52:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:23,190 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-23 06:52:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:23,728 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-23 06:52:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:52:23,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 06:52:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:23,729 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:52:23,730 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:52:23,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:52:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:52:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:52:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:52:23,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-23 06:52:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:23,735 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:52:23,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:52:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:52:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:52:23,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:23,735 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:23,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:52:23,950 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2020-12-23 06:52:23,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:23,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595506690] [2020-12-23 06:52:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:24,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595506690] [2020-12-23 06:52:24,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962923462] [2020-12-23 06:52:24,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:24,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:52:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:24,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:24,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:52:24,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888467234] [2020-12-23 06:52:24,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:52:24,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:52:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:52:24,774 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-23 06:52:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:25,345 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:52:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:52:25,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-23 06:52:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:25,347 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:52:25,347 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:52:25,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:52:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:52:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 06:52:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:52:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 06:52:25,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-23 06:52:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:25,356 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 06:52:25,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:52:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 06:52:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:52:25,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:25,356 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:25,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:52:25,557 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:25,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2020-12-23 06:52:25,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:25,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494051416] [2020-12-23 06:52:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494051416] [2020-12-23 06:52:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280081564] [2020-12-23 06:52:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 06:52:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:26,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:52:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:27,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:27,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:52:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069571375] [2020-12-23 06:52:27,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:52:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:52:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:52:27,087 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-23 06:52:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:27,714 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-23 06:52:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:52:27,714 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-23 06:52:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:27,715 INFO L225 Difference]: With dead ends: 39 [2020-12-23 06:52:27,715 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 06:52:27,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:52:27,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 06:52:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 06:52:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:52:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:52:27,719 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-23 06:52:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:27,719 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:52:27,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:52:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:52:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:52:27,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:27,720 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:27,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:52:27,921 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2020-12-23 06:52:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878050680] [2020-12-23 06:52:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:28,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878050680] [2020-12-23 06:52:28,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684851369] [2020-12-23 06:52:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:28,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:52:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:28,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:28,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:52:28,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833628984] [2020-12-23 06:52:28,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:52:28,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:28,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:52:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:52:28,773 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-23 06:52:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:29,337 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:52:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:52:29,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-23 06:52:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:29,338 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:52:29,338 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:52:29,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:52:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:52:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:52:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:52:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 06:52:29,344 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-23 06:52:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:29,344 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 06:52:29,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:52:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 06:52:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:52:29,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:29,346 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:29,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:52:29,560 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2020-12-23 06:52:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84859223] [2020-12-23 06:52:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84859223] [2020-12-23 06:52:30,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231502135] [2020-12-23 06:52:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:39,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:52:39,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:39,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 06:52:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:40,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:40,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:52:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123218037] [2020-12-23 06:52:40,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:52:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:52:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:52:40,375 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-23 06:52:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:41,060 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 06:52:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:52:41,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-23 06:52:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:41,062 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:52:41,062 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:52:41,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:52:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:52:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:52:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:52:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:52:41,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-23 06:52:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:41,069 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:52:41,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:52:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:52:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:52:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:41,070 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:41,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:41,276 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:41,276 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2020-12-23 06:52:41,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:41,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209668475] [2020-12-23 06:52:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209668475] [2020-12-23 06:52:42,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214321474] [2020-12-23 06:52:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:43,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:52:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:43,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:52:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:43,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:43,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:43,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 35 [2020-12-23 06:52:43,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766561843] [2020-12-23 06:52:43,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:52:43,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:43,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:52:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:52:43,491 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 35 states. [2020-12-23 06:52:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:44,248 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:52:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:52:44,248 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 36 [2020-12-23 06:52:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:44,249 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:52:44,249 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:52:44,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:52:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:52:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 06:52:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:52:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 06:52:44,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-23 06:52:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:44,254 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 06:52:44,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:52:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 06:52:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:52:44,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:44,255 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:44,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:44,457 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2020-12-23 06:52:44,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:44,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822948852] [2020-12-23 06:52:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:45,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822948852] [2020-12-23 06:52:45,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887571536] [2020-12-23 06:52:45,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:52:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:45,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:45,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:52:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830174450] [2020-12-23 06:52:45,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:52:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:52:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:52:45,585 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-23 06:52:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:46,361 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-23 06:52:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:52:46,362 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 06:52:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:46,363 INFO L225 Difference]: With dead ends: 43 [2020-12-23 06:52:46,363 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:52:46,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:52:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:52:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 06:52:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:52:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:52:46,368 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-23 06:52:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:46,368 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:52:46,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:52:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:52:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:52:46,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:46,368 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:46,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:46,569 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2020-12-23 06:52:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:46,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022287033] [2020-12-23 06:52:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022287033] [2020-12-23 06:52:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888061409] [2020-12-23 06:52:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:47,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:47,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:52:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:52:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184591409] [2020-12-23 06:52:47,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:52:47,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:47,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:52:47,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:52:47,653 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-23 06:52:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:48,460 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:52:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:52:48,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-23 06:52:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:48,461 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:52:48,461 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:52:48,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:52:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:52:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:52:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:52:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 06:52:48,468 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-23 06:52:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:48,468 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 06:52:48,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:52:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 06:52:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:52:48,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:48,469 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:48,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:52:48,676 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2020-12-23 06:52:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:48,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039245990] [2020-12-23 06:52:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:49,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039245990] [2020-12-23 06:52:49,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624693497] [2020-12-23 06:52:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:52:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:50,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:52:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:50,608 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:50,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:50,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 38 [2020-12-23 06:52:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579339606] [2020-12-23 06:52:50,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:52:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:52:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:52:50,670 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 38 states. [2020-12-23 06:52:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:51,585 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 06:52:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:52:51,586 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 39 [2020-12-23 06:52:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:51,586 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:52:51,586 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:52:51,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:52:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:52:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:52:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:52:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:52:51,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-23 06:52:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:51,591 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:52:51,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:52:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:52:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:52:51,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:51,592 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:51,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:51,794 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2020-12-23 06:52:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427701438] [2020-12-23 06:52:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:52,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427701438] [2020-12-23 06:52:52,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506098973] [2020-12-23 06:52:52,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:52,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:52,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:52,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:52:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:53,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:53,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:52:53,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360030745] [2020-12-23 06:52:53,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:52:53,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:52:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:52:53,037 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-23 06:52:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:53,947 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:52:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:52:53,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-23 06:52:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:53,949 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:52:53,949 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:52:53,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:52:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:52:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 06:52:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:52:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 06:52:53,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-23 06:52:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:53,954 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 06:52:53,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:52:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 06:52:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:52:53,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:53,955 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:54,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:52:54,164 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2020-12-23 06:52:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449780441] [2020-12-23 06:52:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449780441] [2020-12-23 06:52:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244132705] [2020-12-23 06:52:55,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:08,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:53:08,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:08,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 06:53:08,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:10,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:10,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:53:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626363405] [2020-12-23 06:53:10,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:53:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:53:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:53:10,278 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-23 06:53:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:11,241 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-23 06:53:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:53:11,241 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-23 06:53:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:11,242 INFO L225 Difference]: With dead ends: 47 [2020-12-23 06:53:11,242 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:53:11,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 34 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:53:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:53:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 06:53:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:53:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:53:11,247 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-23 06:53:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:11,247 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:53:11,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:53:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:53:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:53:11,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:11,248 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:11,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:11,454 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:11,455 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2020-12-23 06:53:11,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:11,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895009402] [2020-12-23 06:53:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895009402] [2020-12-23 06:53:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931769417] [2020-12-23 06:53:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:14,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:53:14,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:14,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 06:53:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:15,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:15,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:53:15,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000157304] [2020-12-23 06:53:15,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:53:15,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:53:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:53:15,946 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-23 06:53:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:17,028 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:53:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:53:17,028 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-23 06:53:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:17,029 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:53:17,029 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:53:17,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:53:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:53:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 06:53:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:53:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 06:53:17,034 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-23 06:53:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:17,034 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 06:53:17,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:53:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 06:53:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:53:17,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:17,035 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:17,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:53:17,239 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2020-12-23 06:53:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:17,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043924395] [2020-12-23 06:53:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043924395] [2020-12-23 06:53:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402882249] [2020-12-23 06:53:18,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:18,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:53:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:18,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:53:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679604044] [2020-12-23 06:53:18,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:53:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:53:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:53:18,607 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-23 06:53:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:19,698 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-23 06:53:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:53:19,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-23 06:53:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:19,699 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:53:19,699 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:53:19,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:53:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:53:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 06:53:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:53:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:53:19,704 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-23 06:53:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:19,704 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:53:19,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:53:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:53:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:53:19,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:19,705 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:19,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:53:19,905 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2020-12-23 06:53:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:19,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964791833] [2020-12-23 06:53:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964791833] [2020-12-23 06:53:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787209] [2020-12-23 06:53:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:21,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:53:21,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:21,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:53:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:21,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:21,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:53:21,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089139216] [2020-12-23 06:53:21,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:53:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:53:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:53:21,398 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-23 06:53:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:22,527 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:53:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:53:22,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-23 06:53:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:22,529 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:53:22,529 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:53:22,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:53:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:53:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:53:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:53:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 06:53:22,533 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-23 06:53:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:22,534 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 06:53:22,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:53:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 06:53:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:53:22,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:22,534 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:22,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:53:22,737 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2020-12-23 06:53:22,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:22,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267829327] [2020-12-23 06:53:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267829327] [2020-12-23 06:53:24,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676547853] [2020-12-23 06:53:24,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:25,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 06:53:25,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:25,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:53:25,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:25,356 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:53:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:25,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:25,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 44 [2020-12-23 06:53:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792959067] [2020-12-23 06:53:25,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:53:25,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:53:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:53:25,427 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 44 states. [2020-12-23 06:53:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:26,675 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-23 06:53:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:53:26,678 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 45 [2020-12-23 06:53:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:26,678 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:53:26,678 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:53:26,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:53:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:53:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 06:53:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:53:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:53:26,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-23 06:53:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:26,683 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:53:26,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:53:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:53:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:53:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:26,683 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:26,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:53:26,887 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2020-12-23 06:53:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:26,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110043343] [2020-12-23 06:53:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:28,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110043343] [2020-12-23 06:53:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234297942] [2020-12-23 06:53:28,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:53:28,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:53:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:28,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:53:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:28,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:28,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:53:28,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412306212] [2020-12-23 06:53:28,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:53:28,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:53:28,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:53:28,622 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-23 06:53:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:29,889 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:53:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:53:29,890 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-23 06:53:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:29,891 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:53:29,891 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:53:29,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:53:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:53:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 06:53:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:53:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 06:53:29,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-23 06:53:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:29,896 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 06:53:29,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:53:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 06:53:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:53:29,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:29,897 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:30,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:30,100 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2020-12-23 06:53:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:30,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933787219] [2020-12-23 06:53:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:31,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933787219] [2020-12-23 06:53:31,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31962381] [2020-12-23 06:53:31,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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