/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/overflow_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:45:49,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:45:49,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:45:49,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:45:49,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:45:49,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:45:49,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:45:49,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:45:49,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:45:49,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:45:49,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:45:49,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:45:49,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:45:49,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:45:49,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:45:49,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:45:49,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:45:49,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:45:49,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:45:49,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:45:49,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:45:49,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:45:49,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:45:49,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:45:49,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:45:49,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:45:49,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:45:49,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:45:49,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:45:49,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:45:49,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:45:49,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:45:49,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:45:49,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:45:49,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:45:49,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:45:49,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:45:49,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:45:49,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:45:49,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:45:49,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:45:49,848 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:45:49,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:45:49,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:45:49,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:45:49,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:45:49,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:45:49,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:45:49,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:45:49,849 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:45:49,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:45:49,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:45:49,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:45:49,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:45:49,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:45:49,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:45:49,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:45:49,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:45:49,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:45:49,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:45:49,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:45:49,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:45:49,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:45:50,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:45:50,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:45:50,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:45:50,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:45:50,271 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:45:50,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/overflow_1-1.c [2021-01-06 16:45:50,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/84a5707a8/800efd04290442e18cb08d0c09b6be09/FLAG879682cd2 [2021-01-06 16:45:51,093 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:45:51,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/overflow_1-1.c [2021-01-06 16:45:51,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/84a5707a8/800efd04290442e18cb08d0c09b6be09/FLAG879682cd2 [2021-01-06 16:45:51,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/84a5707a8/800efd04290442e18cb08d0c09b6be09 [2021-01-06 16:45:51,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:45:51,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:45:51,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:45:51,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:45:51,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:45:51,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6588faaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51, skipping insertion in model container [2021-01-06 16:45:51,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:45:51,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:45:51,629 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/overflow_1-1.c[324,337] [2021-01-06 16:45:51,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:45:51,650 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:45:51,664 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/overflow_1-1.c[324,337] [2021-01-06 16:45:51,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:45:51,684 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:45:51,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51 WrapperNode [2021-01-06 16:45:51,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:45:51,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:45:51,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:45:51,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:45:51,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:45:51,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:45:51,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:45:51,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:45:51,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (1/1) ... [2021-01-06 16:45:51,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:45:51,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:45:51,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:45:51,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:45:51,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (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 [2021-01-06 16:45:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:45:51,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:45:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:45:51,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:45:52,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:45:52,152 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:45:52,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:45:52 BoogieIcfgContainer [2021-01-06 16:45:52,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:45:52,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:45:52,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:45:52,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:45:52,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:45:51" (1/3) ... [2021-01-06 16:45:52,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9b7344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:45:52, skipping insertion in model container [2021-01-06 16:45:52,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:51" (2/3) ... [2021-01-06 16:45:52,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9b7344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:45:52, skipping insertion in model container [2021-01-06 16:45:52,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:45:52" (3/3) ... [2021-01-06 16:45:52,165 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-1.c [2021-01-06 16:45:52,178 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:45:52,187 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:45:52,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:45:52,282 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:45:52,283 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:45:52,283 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:45:52,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:45:52,283 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:45:52,283 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:45:52,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:45:52,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:45:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:45:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:45:52,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:52,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:45:52,306 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:45:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:52,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932588214] [2021-01-06 16:45:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:52,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932588214] [2021-01-06 16:45:52,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:45:52,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:45:52,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622577188] [2021-01-06 16:45:52,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:45:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:45:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:52,623 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-01-06 16:45:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:52,656 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:45:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:45:52,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:45:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:52,672 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:45:52,673 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:45:52,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:45:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:45:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:45:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:45:52,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:45:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:52,715 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:45:52,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:45:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:45:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:45:52,716 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:52,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:52,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:45:52,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:45:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:52,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201685145] [2021-01-06 16:45:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201685145] [2021-01-06 16:45:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266299800] [2021-01-06 16:45:52,816 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 [2021-01-06 16:45:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:52,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:45:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:52,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:52,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:45:52,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740600129] [2021-01-06 16:45:52,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:45:52,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:45:52,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:45:52,958 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-01-06 16:45:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:52,979 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-01-06 16:45:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:45:52,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 16:45:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:52,980 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:45:52,980 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:45:52,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:45:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:45:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:45:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:45:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:45:52,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-01-06 16:45:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:52,986 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:45:52,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:45:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:45:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:45:52,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:52,987 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:53,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:45:53,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-01-06 16:45:53,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:53,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806557995] [2021-01-06 16:45:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:53,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806557995] [2021-01-06 16:45:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549251895] [2021-01-06 16:45:53,391 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 [2021-01-06 16:45:53,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:45:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:53,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:53,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:45:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830439647] [2021-01-06 16:45:53,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:45:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:53,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:45:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:45:53,535 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 16:45:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:53,569 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-01-06 16:45:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:45:53,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:45:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:53,571 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:45:53,571 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:45:53,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:45:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:45:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:45:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:45:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-01-06 16:45:53,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-01-06 16:45:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:53,577 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-01-06 16:45:53,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:45:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-01-06 16:45:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:45:53,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:53,578 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:53,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:53,786 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2021-01-06 16:45:53,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:53,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298238080] [2021-01-06 16:45:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:53,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298238080] [2021-01-06 16:45:53,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559822193] [2021-01-06 16:45:53,959 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 [2021-01-06 16:45:54,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:45:54,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:45:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:54,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:54,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:45:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366437340] [2021-01-06 16:45:54,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:45:54,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:54,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:45:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:45:54,094 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2021-01-06 16:45:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:54,141 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-01-06 16:45:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:45:54,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 16:45:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:54,143 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:45:54,143 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:45:54,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:45:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:45:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:45:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:45:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:45:54,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-01-06 16:45:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:54,149 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:45:54,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:45:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:45:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:45:54,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:54,150 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:54,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:54,356 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2021-01-06 16:45:54,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:54,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220570205] [2021-01-06 16:45:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:54,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220570205] [2021-01-06 16:45:54,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355002573] [2021-01-06 16:45:54,566 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 [2021-01-06 16:45:54,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:45:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:45:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:54,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:54,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:45:54,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160768737] [2021-01-06 16:45:54,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:45:54,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:54,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:45:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:45:54,683 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2021-01-06 16:45:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:54,754 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-01-06 16:45:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:45:54,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 16:45:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:54,756 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:45:54,756 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:45:54,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:45:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:45:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:45:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:45:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 16:45:54,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-01-06 16:45:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:54,762 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 16:45:54,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:45:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 16:45:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:45:54,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:54,763 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:54,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:54,977 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2021-01-06 16:45:54,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:54,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336005761] [2021-01-06 16:45:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336005761] [2021-01-06 16:45:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174593217] [2021-01-06 16:45:55,177 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 [2021-01-06 16:45:55,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:45:55,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:45:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:55,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:55,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:45:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542202179] [2021-01-06 16:45:55,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:45:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:45:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:45:55,506 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2021-01-06 16:45:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:55,609 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 16:45:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:45:55,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 16:45:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:55,611 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:45:55,611 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:45:55,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:45:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:45:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 16:45:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:45:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 16:45:55,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-01-06 16:45:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:55,617 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 16:45:55,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:45:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 16:45:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:45:55,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:55,618 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:55,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:45:55,823 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 6 times [2021-01-06 16:45:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:55,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260435327] [2021-01-06 16:45:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:56,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260435327] [2021-01-06 16:45:56,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975192092] [2021-01-06 16:45:56,050 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 [2021-01-06 16:45:56,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:45:56,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:45:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:56,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:56,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:45:56,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226728243] [2021-01-06 16:45:56,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:45:56,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:45:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:45:56,265 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2021-01-06 16:45:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:56,398 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-01-06 16:45:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:45:56,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 16:45:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:56,399 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:45:56,400 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:45:56,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:45:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:45:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 16:45:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:45:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 16:45:56,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-01-06 16:45:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:56,412 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 16:45:56,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:45:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 16:45:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:45:56,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:56,413 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:56,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:56,622 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 7 times [2021-01-06 16:45:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854307402] [2021-01-06 16:45:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854307402] [2021-01-06 16:45:56,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523275619] [2021-01-06 16:45:56,952 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 [2021-01-06 16:45:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:45:57,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:57,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:57,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:45:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048071044] [2021-01-06 16:45:57,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:45:57,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:45:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:45:57,141 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2021-01-06 16:45:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:57,294 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-01-06 16:45:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:45:57,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2021-01-06 16:45:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:57,296 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:45:57,296 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:45:57,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:45:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:45:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 16:45:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:45:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 16:45:57,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-01-06 16:45:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:57,302 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 16:45:57,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:45:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 16:45:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:45:57,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:57,303 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:57,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:57,518 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 8 times [2021-01-06 16:45:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:57,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503784163] [2021-01-06 16:45:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:57,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503784163] [2021-01-06 16:45:57,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017811386] [2021-01-06 16:45:57,819 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 [2021-01-06 16:45:57,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:57,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:45:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:58,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:58,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:45:58,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439650152] [2021-01-06 16:45:58,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:45:58,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:58,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:45:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:45:58,105 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2021-01-06 16:45:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:58,310 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 16:45:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:45:58,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 16:45:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:58,314 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:45:58,314 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:45:58,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:45:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:45:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:45:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:45:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 16:45:58,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-01-06 16:45:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:58,324 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 16:45:58,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:45:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 16:45:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:45:58,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:58,326 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:58,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:45:58,529 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 9 times [2021-01-06 16:45:58,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:58,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551203799] [2021-01-06 16:45:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551203799] [2021-01-06 16:45:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9747951] [2021-01-06 16:45:58,915 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 [2021-01-06 16:45:59,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:45:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:45:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:59,165 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:45:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:59,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:59,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2021-01-06 16:45:59,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186829157] [2021-01-06 16:45:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:45:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:45:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:45:59,217 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 22 states. [2021-01-06 16:45:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:59,517 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-01-06 16:45:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:45:59,518 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2021-01-06 16:45:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:59,519 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:45:59,519 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:45:59,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:45:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:45:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:45:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:45:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-01-06 16:45:59,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-01-06 16:45:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:59,526 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-01-06 16:45:59,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:45:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-01-06 16:45:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:45:59,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:59,527 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:59,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:59,731 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 10 times [2021-01-06 16:45:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413378087] [2021-01-06 16:45:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413378087] [2021-01-06 16:46:00,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490598849] [2021-01-06 16:46:00,181 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 [2021-01-06 16:46:00,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:00,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:46:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:00,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:00,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:46:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715756880] [2021-01-06 16:46:00,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:46:00,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:46:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:46:00,521 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2021-01-06 16:46:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:00,853 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-01-06 16:46:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:46:00,854 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2021-01-06 16:46:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:00,858 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:46:00,858 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:46:00,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:46:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:46:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:46:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:46:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-01-06 16:46:00,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-01-06 16:46:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:00,870 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-01-06 16:46:00,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:46:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-01-06 16:46:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:46:00,871 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:00,871 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:01,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:01,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 11 times [2021-01-06 16:46:01,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:01,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369275029] [2021-01-06 16:46:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369275029] [2021-01-06 16:46:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442225330] [2021-01-06 16:46:01,536 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 [2021-01-06 16:46:03,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:46:03,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:03,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:46:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:03,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:03,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:46:03,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912173962] [2021-01-06 16:46:03,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:46:03,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:46:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:03,866 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2021-01-06 16:46:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:04,284 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 16:46:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:46:04,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 16:46:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:04,285 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:46:04,286 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:46:04,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:46:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:46:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:46:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-01-06 16:46:04,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-01-06 16:46:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:04,292 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-01-06 16:46:04,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:46:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-01-06 16:46:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:46:04,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:04,293 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:04,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:46:04,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 12 times [2021-01-06 16:46:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148877076] [2021-01-06 16:46:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148877076] [2021-01-06 16:46:05,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899227284] [2021-01-06 16:46:05,136 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 [2021-01-06 16:46:05,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:46:05,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:05,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:46:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:05,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:05,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:46:05,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595638708] [2021-01-06 16:46:05,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:46:05,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:05,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:46:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:05,744 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2021-01-06 16:46:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:06,140 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-01-06 16:46:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:46:06,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2021-01-06 16:46:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:06,142 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:46:06,142 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:46:06,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:46:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 16:46:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:46:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-01-06 16:46:06,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2021-01-06 16:46:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:06,148 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-01-06 16:46:06,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:46:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-01-06 16:46:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:46:06,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:06,150 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:06,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:46:06,362 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 13 times [2021-01-06 16:46:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:06,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487124466] [2021-01-06 16:46:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487124466] [2021-01-06 16:46:06,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609806068] [2021-01-06 16:46:06,988 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 [2021-01-06 16:46:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:07,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:46:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:07,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:07,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:46:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598940254] [2021-01-06 16:46:07,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:46:07,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:46:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:07,488 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2021-01-06 16:46:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:07,998 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-01-06 16:46:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:46:07,999 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 16:46:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:08,000 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:46:08,000 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:46:08,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:46:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 16:46:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:46:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-01-06 16:46:08,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2021-01-06 16:46:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:08,005 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-01-06 16:46:08,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:46:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-01-06 16:46:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:46:08,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:08,006 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:08,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:46:08,210 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 14 times [2021-01-06 16:46:08,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:08,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963875793] [2021-01-06 16:46:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963875793] [2021-01-06 16:46:09,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227924948] [2021-01-06 16:46:09,000 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 [2021-01-06 16:46:09,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:09,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:46:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:09,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:09,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:46:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566700987] [2021-01-06 16:46:09,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:46:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:46:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:09,546 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2021-01-06 16:46:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:10,076 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 16:46:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:46:10,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2021-01-06 16:46:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:10,078 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:46:10,079 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:46:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:46:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 16:46:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:46:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 16:46:10,090 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2021-01-06 16:46:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:10,091 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 16:46:10,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:46:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 16:46:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:46:10,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:10,092 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:10,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:10,296 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 15 times [2021-01-06 16:46:10,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827047282] [2021-01-06 16:46:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827047282] [2021-01-06 16:46:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398570700] [2021-01-06 16:46:11,153 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 [2021-01-06 16:46:11,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:46:11,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:46:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:11,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:46:11,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994409510] [2021-01-06 16:46:11,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:46:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:46:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:46:11,835 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2021-01-06 16:46:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:12,430 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-01-06 16:46:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:46:12,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 16:46:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:12,431 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:46:12,432 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:46:12,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:46:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:46:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 16:46:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:46:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-01-06 16:46:12,438 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2021-01-06 16:46:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:12,439 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-01-06 16:46:12,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:46:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-01-06 16:46:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:46:12,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:12,440 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:12,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:46:12,650 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 16 times [2021-01-06 16:46:12,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:12,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802731191] [2021-01-06 16:46:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802731191] [2021-01-06 16:46:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736236951] [2021-01-06 16:46:13,689 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 [2021-01-06 16:46:13,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:13,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:13,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:46:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:14,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:14,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:46:14,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104440505] [2021-01-06 16:46:14,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:46:14,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:46:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:46:14,140 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2021-01-06 16:46:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:14,860 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-01-06 16:46:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:46:14,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2021-01-06 16:46:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:14,862 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:46:14,862 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:46:14,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:46:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:46:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 16:46:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:46:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-01-06 16:46:14,869 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2021-01-06 16:46:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:14,869 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-01-06 16:46:14,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:46:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-01-06 16:46:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:46:14,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:14,870 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:15,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:46:15,074 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 17 times [2021-01-06 16:46:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:15,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425974123] [2021-01-06 16:46:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425974123] [2021-01-06 16:46:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364571729] [2021-01-06 16:46:16,175 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 [2021-01-06 16:46:32,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:46:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:32,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 16:46:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:33,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:33,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:46:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145299649] [2021-01-06 16:46:33,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:46:33,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:46:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:46:33,531 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2021-01-06 16:46:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:34,377 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 16:46:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:46:34,378 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2021-01-06 16:46:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:34,378 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:46:34,378 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:46:34,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 32 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:46:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:46:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:46:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:46:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-01-06 16:46:34,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2021-01-06 16:46:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:34,385 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-01-06 16:46:34,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:46:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-01-06 16:46:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:46:34,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:34,386 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:34,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:46:34,590 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 18 times [2021-01-06 16:46:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380765514] [2021-01-06 16:46:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:35,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380765514] [2021-01-06 16:46:35,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774812272] [2021-01-06 16:46:35,795 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 [2021-01-06 16:46:37,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:46:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:37,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:46:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:38,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:38,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:46:38,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374851182] [2021-01-06 16:46:38,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:46:38,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:46:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:38,069 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2021-01-06 16:46:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:39,072 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-01-06 16:46:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:46:39,073 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2021-01-06 16:46:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:39,074 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:46:39,074 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:46:39,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:46:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 16:46:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:46:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 16:46:39,083 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2021-01-06 16:46:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:39,084 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 16:46:39,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:46:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 16:46:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:46:39,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:39,085 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:39,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:39,290 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:39,291 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 19 times [2021-01-06 16:46:39,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:39,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415514549] [2021-01-06 16:46:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:40,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415514549] [2021-01-06 16:46:40,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763390110] [2021-01-06 16:46:40,624 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 [2021-01-06 16:46:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:40,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:46:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:41,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:41,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:46:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033921721] [2021-01-06 16:46:41,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:46:41,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:46:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:46:41,323 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2021-01-06 16:46:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:42,375 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-01-06 16:46:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:46:42,376 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2021-01-06 16:46:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:42,377 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:46:42,377 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:46:42,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:46:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:46:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:46:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:46:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 16:46:42,385 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2021-01-06 16:46:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:42,385 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 16:46:42,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:46:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 16:46:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:46:42,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:42,386 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:42,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:42,602 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 20 times [2021-01-06 16:46:42,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:42,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318229] [2021-01-06 16:46:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318229] [2021-01-06 16:46:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196360727] [2021-01-06 16:46:44,108 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 [2021-01-06 16:46:44,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:44,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:44,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 97 conjunts are in the unsatisfiable core [2021-01-06 16:46:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:45,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:45,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:46:45,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535997333] [2021-01-06 16:46:45,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:46:45,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:46:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:46:45,065 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2021-01-06 16:46:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:46,301 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 16:46:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:46:46,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2021-01-06 16:46:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:46,307 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:46:46,307 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:46:46,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:46:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:46:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:46:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:46:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-01-06 16:46:46,312 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2021-01-06 16:46:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:46,313 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-01-06 16:46:46,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:46:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-01-06 16:46:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:46:46,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:46,313 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:46,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:46:46,514 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 21 times [2021-01-06 16:46:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:46,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274908044] [2021-01-06 16:46:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:48,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274908044] [2021-01-06 16:46:48,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824342572] [2021-01-06 16:46:48,128 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 [2021-01-06 16:46:49,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:46:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:49,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 115 conjunts are in the unsatisfiable core [2021-01-06 16:46:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:50,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:50,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:46:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589458689] [2021-01-06 16:46:50,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:46:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:46:50,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:46:50,887 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2021-01-06 16:46:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:52,190 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-01-06 16:46:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:46:52,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2021-01-06 16:46:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:52,193 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:46:52,193 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:46:52,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 25 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:46:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:46:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 16:46:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:46:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-01-06 16:46:52,198 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2021-01-06 16:46:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:52,199 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-01-06 16:46:52,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:46:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-01-06 16:46:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 16:46:52,199 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:52,199 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:52,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:46:52,400 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 22 times [2021-01-06 16:46:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:52,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792504508] [2021-01-06 16:46:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792504508] [2021-01-06 16:46:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082570837] [2021-01-06 16:46:54,139 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 [2021-01-06 16:46:54,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:54,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 112 conjunts are in the unsatisfiable core [2021-01-06 16:46:54,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:55,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:55,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:46:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145211254] [2021-01-06 16:46:55,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:46:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:46:55,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:46:55,380 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2021-01-06 16:46:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:56,861 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-01-06 16:46:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:46:56,861 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2021-01-06 16:46:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:56,862 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:46:56,862 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:46:56,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 23 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:46:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:46:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 16:46:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:46:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-01-06 16:46:56,874 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2021-01-06 16:46:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:56,875 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-01-06 16:46:56,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:46:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-01-06 16:46:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:46:56,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:56,876 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:57,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:57,085 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 23 times [2021-01-06 16:46:57,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:57,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589826601] [2021-01-06 16:46:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:58,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589826601] [2021-01-06 16:46:58,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322977863] [2021-01-06 16:46:58,873 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 [2021-01-06 16:49:32,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:49:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:49:32,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 136 conjunts are in the unsatisfiable core [2021-01-06 16:49:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:49:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:34,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:49:34,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:49:34,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620132120] [2021-01-06 16:49:34,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:49:34,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:49:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:49:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:49:34,435 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2021-01-06 16:49:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:49:36,086 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 16:49:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:49:36,088 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2021-01-06 16:49:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:49:36,089 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:49:36,089 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:49:36,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 44 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:49:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:49:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 16:49:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:49:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-01-06 16:49:36,094 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-01-06 16:49:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:49:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-01-06 16:49:36,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:49:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-01-06 16:49:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 16:49:36,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:49:36,095 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:49:36,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:49:36,303 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:49:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:49:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 24 times [2021-01-06 16:49:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:49:36,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125681452] [2021-01-06 16:49:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:49:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:38,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125681452] [2021-01-06 16:49:38,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851842072] [2021-01-06 16:49:38,242 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 [2021-01-06 16:49:49,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:49:49,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:49:49,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 105 conjunts are in the unsatisfiable core [2021-01-06 16:49:49,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:49:49,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:49:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:49,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:49:49,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51] total 52 [2021-01-06 16:49:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620834676] [2021-01-06 16:49:49,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:49:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:49:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:49:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:49:49,857 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 52 states. [2021-01-06 16:49:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:49:51,587 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-01-06 16:49:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:49:51,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 53 [2021-01-06 16:49:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:49:51,589 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:49:51,589 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:49:51,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:49:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:49:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 16:49:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 16:49:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-01-06 16:49:51,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2021-01-06 16:49:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:49:51,598 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-01-06 16:49:51,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:49:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-01-06 16:49:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:49:51,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:49:51,599 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:49:51,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:49:51,799 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:49:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:49:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 25 times [2021-01-06 16:49:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:49:51,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454472478] [2021-01-06 16:49:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:49:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:53,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454472478] [2021-01-06 16:49:53,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616946355] [2021-01-06 16:49:53,979 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 [2021-01-06 16:49:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:54,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 129 conjunts are in the unsatisfiable core [2021-01-06 16:49:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:49:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:49:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:49:55,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348571350] [2021-01-06 16:49:55,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:49:55,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:49:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:49:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:49:55,677 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2021-01-06 16:49:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:49:57,541 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-01-06 16:49:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:49:57,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2021-01-06 16:49:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:49:57,543 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:49:57,543 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:49:57,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 28 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:49:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:49:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 16:49:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 16:49:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-01-06 16:49:57,552 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2021-01-06 16:49:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:49:57,552 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-01-06 16:49:57,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:49:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-01-06 16:49:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 16:49:57,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:49:57,553 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:49:57,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:49:57,756 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:49:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:49:57,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1839762160, now seen corresponding path program 26 times [2021-01-06 16:49:57,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:49:57,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553957871] [2021-01-06 16:49:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:49:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553957871] [2021-01-06 16:50:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17280556] [2021-01-06 16:50:00,116 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 [2021-01-06 16:50:00,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:00,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:00,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 128 conjunts are in the unsatisfiable core [2021-01-06 16:50:00,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:01,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:01,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:50:01,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520828875] [2021-01-06 16:50:01,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:50:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:50:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:50:01,577 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2021-01-06 16:50:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:03,649 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 16:50:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:50:03,650 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2021-01-06 16:50:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:03,650 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:50:03,651 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:50:03,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:50:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:50:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 16:50:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:50:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-01-06 16:50:03,658 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2021-01-06 16:50:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:03,658 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-01-06 16:50:03,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:50:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-01-06 16:50:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:50:03,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:03,659 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:03,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:50:03,865 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1461798320, now seen corresponding path program 27 times [2021-01-06 16:50:03,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:03,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437968477] [2021-01-06 16:50:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437968477] [2021-01-06 16:50:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079858988] [2021-01-06 16:50:06,454 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 [2021-01-06 16:50:08,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:50:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:08,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 110 conjunts are in the unsatisfiable core [2021-01-06 16:50:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:08,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:08,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:50:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454952683] [2021-01-06 16:50:08,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:50:08,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:50:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:50:08,321 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 57 states. [2021-01-06 16:50:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:10,525 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-01-06 16:50:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:50:10,525 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2021-01-06 16:50:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:10,526 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:50:10,526 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:50:10,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:50:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:50:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 16:50:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:50:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-01-06 16:50:10,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2021-01-06 16:50:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:10,533 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-01-06 16:50:10,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:50:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-01-06 16:50:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 16:50:10,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:10,533 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:10,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:50:10,737 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -280587856, now seen corresponding path program 28 times [2021-01-06 16:50:10,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545965646] [2021-01-06 16:50:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:13,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545965646] [2021-01-06 16:50:13,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845270177] [2021-01-06 16:50:13,405 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 [2021-01-06 16:50:13,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:13,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 133 conjunts are in the unsatisfiable core [2021-01-06 16:50:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:14,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:14,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:50:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060633814] [2021-01-06 16:50:14,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:50:14,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:50:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:50:14,911 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2021-01-06 16:50:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:17,301 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-01-06 16:50:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:50:17,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2021-01-06 16:50:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:17,305 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:50:17,305 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:50:17,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 21 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:50:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:50:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 16:50:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:50:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-01-06 16:50:17,312 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2021-01-06 16:50:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:17,312 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-01-06 16:50:17,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:50:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-01-06 16:50:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 16:50:17,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:17,313 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:17,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:50:17,529 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash 991301904, now seen corresponding path program 29 times [2021-01-06 16:50:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:17,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279758692] [2021-01-06 16:50:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279758692] [2021-01-06 16:50:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275708464] [2021-01-06 16:50:20,461 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