/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/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:33:44,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:33:44,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:33:44,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:33:44,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:33:44,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:33:44,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:33:44,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:33:44,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:33:44,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:33:44,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:33:44,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:33:44,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:33:44,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:33:44,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:33:44,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:33:44,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:33:44,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:33:44,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:33:44,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:33:44,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:33:44,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:33:44,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:33:44,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:33:44,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:33:44,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:33:44,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:33:44,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:33:44,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:33:44,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:33:44,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:33:44,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:33:44,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:33:44,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:33:44,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:33:44,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:33:44,824 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 11:33:44,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:33:44,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:33:44,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:33:44,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:33:44,884 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:33:44,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:33:44,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:33:44,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:33:44,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:33:44,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:33:44,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:33:44,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:33:44,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:33:44,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:33:44,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:33:44,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:33:44,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:33:44,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:33:44,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:33:44,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:33:44,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:33:45,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:33:45,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:33:45,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:33:45,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:33:45,356 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:33:45,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2021-01-06 11:33:45,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5d729837/bbcc25d65c104e86a0cec91d9d2f8b7b/FLAG0ce04a4c4 [2021-01-06 11:33:46,000 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:33:46,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2021-01-06 11:33:46,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5d729837/bbcc25d65c104e86a0cec91d9d2f8b7b/FLAG0ce04a4c4 [2021-01-06 11:33:46,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5d729837/bbcc25d65c104e86a0cec91d9d2f8b7b [2021-01-06 11:33:46,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:33:46,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:33:46,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:33:46,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:33:46,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:33:46,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac9964b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46, skipping insertion in model container [2021-01-06 11:33:46,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:33:46,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:33:46,549 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/bitvector-loops/overflow_1-2.c[324,337] [2021-01-06 11:33:46,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:33:46,571 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:33:46,583 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/bitvector-loops/overflow_1-2.c[324,337] [2021-01-06 11:33:46,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:33:46,600 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:33:46,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46 WrapperNode [2021-01-06 11:33:46,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:33:46,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:33:46,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:33:46,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:33:46,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:33:46,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:33:46,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:33:46,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:33:46,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (1/1) ... [2021-01-06 11:33:46,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:33:46,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:33:46,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:33:46,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:33:46,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (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 11:33:46,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:33:46,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:33:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:33:46,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:33:47,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:33:47,138 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 11:33:47,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:33:47 BoogieIcfgContainer [2021-01-06 11:33:47,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:33:47,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:33:47,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:33:47,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:33:47,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:33:46" (1/3) ... [2021-01-06 11:33:47,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2387f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:33:47, skipping insertion in model container [2021-01-06 11:33:47,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:46" (2/3) ... [2021-01-06 11:33:47,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2387f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:33:47, skipping insertion in model container [2021-01-06 11:33:47,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:33:47" (3/3) ... [2021-01-06 11:33:47,158 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2021-01-06 11:33:47,166 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:33:47,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:33:47,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:33:47,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:33:47,243 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:33:47,243 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:33:47,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:33:47,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:33:47,244 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:33:47,244 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:33:47,244 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:33:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 11:33:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 11:33:47,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:47,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 11:33:47,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 11:33:47,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:47,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028036334] [2021-01-06 11:33:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:47,591 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 11:33:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028036334] [2021-01-06 11:33:47,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:33:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720982218] [2021-01-06 11:33:47,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:33:47,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:33:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:47,619 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-01-06 11:33:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:47,657 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 11:33:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:33:47,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 11:33:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:47,683 INFO L225 Difference]: With dead ends: 18 [2021-01-06 11:33:47,686 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 11:33:47,692 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 11:33:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 11:33:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 11:33:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 11:33:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 11:33:47,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 11:33:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:47,751 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 11:33:47,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:33:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 11:33:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 11:33:47,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:47,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:47,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:33:47,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 11:33:47,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:47,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092567793] [2021-01-06 11:33:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:47,848 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 11:33:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092567793] [2021-01-06 11:33:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826929904] [2021-01-06 11:33:47,849 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 11:33:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:33:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:48,007 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 11:33:48,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:48,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:33:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611015861] [2021-01-06 11:33:48,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:33:48,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:33:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:33:48,012 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-01-06 11:33:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:48,038 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-01-06 11:33:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:33:48,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 11:33:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:48,040 INFO L225 Difference]: With dead ends: 14 [2021-01-06 11:33:48,041 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 11:33:48,042 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 11:33:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 11:33:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 11:33:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 11:33:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 11:33:48,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-01-06 11:33:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:48,049 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 11:33:48,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:33:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 11:33:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 11:33:48,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:48,050 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:48,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 11:33:48,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-01-06 11:33:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:48,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858790411] [2021-01-06 11:33:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:48,418 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 11:33:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858790411] [2021-01-06 11:33:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659576847] [2021-01-06 11:33:48,420 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 11:33:48,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:33:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:48,567 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 11:33:48,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:33:48,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501780587] [2021-01-06 11:33:48,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:33:48,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:48,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:33:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:33:48,576 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 11:33:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:48,635 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-01-06 11:33:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:33:48,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 11:33:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:48,640 INFO L225 Difference]: With dead ends: 16 [2021-01-06 11:33:48,640 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 11:33:48,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 2 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 11:33:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 11:33:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 11:33:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 11:33:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-01-06 11:33:48,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-01-06 11:33:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:48,647 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-01-06 11:33:48,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:33:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-01-06 11:33:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:33:48,651 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:48,651 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:48,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:48,853 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2021-01-06 11:33:48,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:48,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033086929] [2021-01-06 11:33:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:49,034 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 11:33:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033086929] [2021-01-06 11:33:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022489799] [2021-01-06 11:33:49,035 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 11:33:49,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:33:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:33:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:49,181 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 11:33:49,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:49,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:33:49,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734574091] [2021-01-06 11:33:49,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:33:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:33:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:49,185 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2021-01-06 11:33:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:49,244 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-01-06 11:33:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:33:49,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 11:33:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:49,269 INFO L225 Difference]: With dead ends: 18 [2021-01-06 11:33:49,270 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 11:33:49,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 11:33:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 11:33:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:33:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 11:33:49,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-01-06 11:33:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:49,276 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 11:33:49,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:33:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 11:33:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:33:49,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:49,277 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:49,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:49,493 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:49,495 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2021-01-06 11:33:49,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:49,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872239173] [2021-01-06 11:33:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:49,742 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 11:33:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872239173] [2021-01-06 11:33:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737564156] [2021-01-06 11:33:49,743 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 11:33:49,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:33:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:49,913 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 11:33:49,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:49,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:33:49,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285571113] [2021-01-06 11:33:49,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:33:49,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:33:49,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:33:49,916 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2021-01-06 11:33:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:49,999 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-01-06 11:33:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:33:50,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 11:33:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:50,001 INFO L225 Difference]: With dead ends: 20 [2021-01-06 11:33:50,001 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 11:33:50,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 4 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 11:33:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 11:33:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 11:33:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 11:33:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 11:33:50,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-01-06 11:33:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:50,007 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 11:33:50,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:33:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 11:33:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:33:50,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:50,008 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:50,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:50,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2021-01-06 11:33:50,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:50,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037589860] [2021-01-06 11:33:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:50,430 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 11:33:50,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037589860] [2021-01-06 11:33:50,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593594753] [2021-01-06 11:33:50,431 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 11:33:50,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:33:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:33:50,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:50,783 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 11:33:50,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:50,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:33:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223040079] [2021-01-06 11:33:50,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:33:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:33:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:33:50,786 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2021-01-06 11:33:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:50,893 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 11:33:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:33:50,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 11:33:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:50,895 INFO L225 Difference]: With dead ends: 22 [2021-01-06 11:33:50,895 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:33:50,896 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 11:33:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:33:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 11:33:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 11:33:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 11:33:50,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-01-06 11:33:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:50,901 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 11:33:50,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:33:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 11:33:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:33:50,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:50,902 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:51,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 11:33:51,114 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 6 times [2021-01-06 11:33:51,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:51,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361910058] [2021-01-06 11:33:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:51,396 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 11:33:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361910058] [2021-01-06 11:33:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865665958] [2021-01-06 11:33:51,397 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 11:33:51,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:33:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:33:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:51,620 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 11:33:51,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:51,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:33:51,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402954976] [2021-01-06 11:33:51,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:33:51,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:33:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:33:51,627 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2021-01-06 11:33:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:51,765 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-01-06 11:33:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:33:51,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 11:33:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:51,767 INFO L225 Difference]: With dead ends: 24 [2021-01-06 11:33:51,768 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 11:33:51,770 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 11:33:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 11:33:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 11:33:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 11:33:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 11:33:51,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-01-06 11:33:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:51,781 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 11:33:51,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:33:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 11:33:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:33:51,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:51,782 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:51,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:51,985 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 7 times [2021-01-06 11:33:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:51,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175010127] [2021-01-06 11:33:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:52,312 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 11:33:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175010127] [2021-01-06 11:33:52,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663494858] [2021-01-06 11:33:52,313 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 11:33:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:52,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 11:33:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:52,527 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 11:33:52,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:52,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:33:52,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373139892] [2021-01-06 11:33:52,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:33:52,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:33:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:33:52,530 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2021-01-06 11:33:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:52,687 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-01-06 11:33:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:33:52,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2021-01-06 11:33:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:52,689 INFO L225 Difference]: With dead ends: 26 [2021-01-06 11:33:52,689 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 11:33:52,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:33:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 11:33:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 11:33:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 11:33:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 11:33:52,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-01-06 11:33:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:52,695 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 11:33:52,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:33:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 11:33:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:33:52,696 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:52,696 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:52,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:52,912 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 8 times [2021-01-06 11:33:52,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:52,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189152433] [2021-01-06 11:33:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:53,242 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 11:33:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189152433] [2021-01-06 11:33:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38854111] [2021-01-06 11:33:53,243 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 11:33:53,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:53,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 11:33:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:53,466 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 11:33:53,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:53,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:33:53,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234823496] [2021-01-06 11:33:53,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:33:53,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:53,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:33:53,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:33:53,468 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2021-01-06 11:33:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:53,690 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 11:33:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:33:53,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 11:33:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:53,691 INFO L225 Difference]: With dead ends: 28 [2021-01-06 11:33:53,691 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:33:53,692 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 11:33:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:33:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 11:33:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 11:33:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 11:33:53,697 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-01-06 11:33:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:53,697 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 11:33:53,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:33:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 11:33:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:33:53,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:53,698 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:53,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 11:33:53,912 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 9 times [2021-01-06 11:33:53,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:53,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840807036] [2021-01-06 11:33:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:54,263 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 11:33:54,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840807036] [2021-01-06 11:33:54,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732740338] [2021-01-06 11:33:54,264 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 11:33:54,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 11:33:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 11:33:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:54,804 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 11:33:54,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:54,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 11:33:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260347789] [2021-01-06 11:33:54,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:33:54,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:33:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:33:54,807 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2021-01-06 11:33:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:55,081 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-01-06 11:33:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:33:55,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 11:33:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:55,083 INFO L225 Difference]: With dead ends: 30 [2021-01-06 11:33:55,083 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:33:55,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:33:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:33:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 11:33:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 11:33:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-01-06 11:33:55,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-01-06 11:33:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:55,090 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-01-06 11:33:55,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:33:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-01-06 11:33:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:33:55,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:55,091 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:55,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:55,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:55,299 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 10 times [2021-01-06 11:33:55,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:55,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075873778] [2021-01-06 11:33:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:55,731 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 11:33:55,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075873778] [2021-01-06 11:33:55,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771725902] [2021-01-06 11:33:55,732 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 11:33:55,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:55,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 11:33:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:56,091 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 11:33:56,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:56,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 11:33:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381257115] [2021-01-06 11:33:56,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:33:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:33:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:33:56,094 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2021-01-06 11:33:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:56,379 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-01-06 11:33:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:33:56,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2021-01-06 11:33:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:56,381 INFO L225 Difference]: With dead ends: 32 [2021-01-06 11:33:56,381 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 11:33:56,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 10 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 11:33:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 11:33:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 11:33:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 11:33:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-01-06 11:33:56,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-01-06 11:33:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:56,387 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-01-06 11:33:56,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:33:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-01-06 11:33:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:33:56,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:56,389 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2021-01-06 11:33:56,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:56,603 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 11 times [2021-01-06 11:33:56,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:56,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223609530] [2021-01-06 11:33:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:57,084 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 11:33:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223609530] [2021-01-06 11:33:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051706329] [2021-01-06 11:33:57,085 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 11:33:59,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:33:59,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:59,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 11:33:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:59,575 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 11:33:59,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:59,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 11:33:59,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324067315] [2021-01-06 11:33:59,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:33:59,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:33:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:33:59,577 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2021-01-06 11:33:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:59,962 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 11:33:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:33:59,963 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 11:33:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:59,963 INFO L225 Difference]: With dead ends: 34 [2021-01-06 11:33:59,963 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 11:33:59,964 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 11:33:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 11:33:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 11:33:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:33:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-01-06 11:33:59,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-01-06 11:33:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:59,970 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-01-06 11:33:59,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:33:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-01-06 11:33:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:33:59,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:59,971 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:00,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 11:34:00,172 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 12 times [2021-01-06 11:34:00,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:00,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465163383] [2021-01-06 11:34:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:00,808 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 11:34:00,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465163383] [2021-01-06 11:34:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774853506] [2021-01-06 11:34:00,809 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 11:34:01,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:34:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 11:34:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:01,800 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 11:34:01,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:01,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 11:34:01,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810321099] [2021-01-06 11:34:01,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:34:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:34:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:34:01,803 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2021-01-06 11:34:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:02,220 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-01-06 11:34:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:34:02,221 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2021-01-06 11:34:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:02,221 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:34:02,222 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 11:34:02,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:34:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 11:34:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 11:34:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:34:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-01-06 11:34:02,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2021-01-06 11:34:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:02,228 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-01-06 11:34:02,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:34:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-01-06 11:34:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:34:02,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:02,229 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:02,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:34:02,433 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 13 times [2021-01-06 11:34:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:02,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95553151] [2021-01-06 11:34:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:03,096 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 11:34:03,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95553151] [2021-01-06 11:34:03,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39020772] [2021-01-06 11:34:03,098 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 11:34:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:03,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 11:34:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:03,710 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 11:34:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 11:34:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206236031] [2021-01-06 11:34:03,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 11:34:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 11:34:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:34:03,712 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2021-01-06 11:34:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:04,275 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-01-06 11:34:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 11:34:04,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 11:34:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:04,277 INFO L225 Difference]: With dead ends: 38 [2021-01-06 11:34:04,277 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 11:34:04,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:34:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 11:34:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 11:34:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 11:34:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-01-06 11:34:04,283 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2021-01-06 11:34:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-01-06 11:34:04,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 11:34:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-01-06 11:34:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:34:04,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:04,285 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:04,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:34:04,500 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 14 times [2021-01-06 11:34:04,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:04,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896755462] [2021-01-06 11:34:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:05,282 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 11:34:05,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896755462] [2021-01-06 11:34:05,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452189384] [2021-01-06 11:34:05,283 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 11:34:05,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:34:05,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:05,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 11:34:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:05,870 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 11:34:05,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:05,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 11:34:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634009008] [2021-01-06 11:34:05,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:34:05,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:34:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:34:05,873 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2021-01-06 11:34:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:06,541 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 11:34:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 11:34:06,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2021-01-06 11:34:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:06,545 INFO L225 Difference]: With dead ends: 40 [2021-01-06 11:34:06,545 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 11:34:06,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:34:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 11:34:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 11:34:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 11:34:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 11:34:06,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2021-01-06 11:34:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:06,552 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 11:34:06,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:34:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 11:34:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:34:06,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:06,553 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:06,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:06,767 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 15 times [2021-01-06 11:34:06,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:06,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572551577] [2021-01-06 11:34:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:07,626 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 11:34:07,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572551577] [2021-01-06 11:34:07,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156872361] [2021-01-06 11:34:07,627 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 11:34:09,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 11:34:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:09,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 11:34:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:09,681 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 11:34:09,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:09,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 11:34:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503296864] [2021-01-06 11:34:09,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:34:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:34:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:34:09,684 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2021-01-06 11:34:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:10,406 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-01-06 11:34:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 11:34:10,407 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 11:34:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:10,408 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:34:10,408 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 11:34:10,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:34:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 11:34:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 11:34:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:34:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-01-06 11:34:10,415 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2021-01-06 11:34:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:10,415 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-01-06 11:34:10,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:34:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-01-06 11:34:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:34:10,416 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:10,416 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:10,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:34:10,622 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 16 times [2021-01-06 11:34:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:10,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293781275] [2021-01-06 11:34:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:11,646 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 11:34:11,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293781275] [2021-01-06 11:34:11,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039764115] [2021-01-06 11:34:11,647 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 11:34:11,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:34:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:11,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 11:34:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:12,174 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 11:34:12,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:12,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 11:34:12,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212337135] [2021-01-06 11:34:12,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 11:34:12,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:12,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 11:34:12,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:34:12,177 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2021-01-06 11:34:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:12,965 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-01-06 11:34:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 11:34:12,966 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2021-01-06 11:34:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:12,967 INFO L225 Difference]: With dead ends: 44 [2021-01-06 11:34:12,967 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:34:12,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 11 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 11:34:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:34:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 11:34:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:34:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-01-06 11:34:12,975 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2021-01-06 11:34:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:12,975 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-01-06 11:34:12,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 11:34:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-01-06 11:34:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 11:34:12,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:12,976 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:13,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:34:13,190 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 17 times [2021-01-06 11:34:13,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:13,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040767235] [2021-01-06 11:34:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:14,266 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 11:34:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040767235] [2021-01-06 11:34:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599495007] [2021-01-06 11:34:14,267 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 11:34:30,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 11:34:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:30,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 11:34:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:32,128 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 11:34:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 11:34:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673140287] [2021-01-06 11:34:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 11:34:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 11:34:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 11:34:32,131 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2021-01-06 11:34:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:33,001 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 11:34:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 11:34:33,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2021-01-06 11:34:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:33,003 INFO L225 Difference]: With dead ends: 46 [2021-01-06 11:34:33,003 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 11:34:33,004 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 11:34:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 11:34:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 11:34:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:34:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-01-06 11:34:33,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2021-01-06 11:34:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:33,011 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-01-06 11:34:33,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 11:34:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-01-06 11:34:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:34:33,013 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:33,013 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:33,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:34:33,218 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:33,219 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 18 times [2021-01-06 11:34:33,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:33,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869750869] [2021-01-06 11:34:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:34,360 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 11:34:34,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869750869] [2021-01-06 11:34:34,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232153974] [2021-01-06 11:34:34,360 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 11:34:36,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 11:34:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:36,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 11:34:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:36,804 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 11:34:36,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:36,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 11:34:36,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961843141] [2021-01-06 11:34:36,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 11:34:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 11:34:36,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:34:36,806 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2021-01-06 11:34:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:37,772 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-01-06 11:34:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 11:34:37,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2021-01-06 11:34:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:37,774 INFO L225 Difference]: With dead ends: 48 [2021-01-06 11:34:37,774 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 11:34:37,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:34:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 11:34:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 11:34:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:34:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 11:34:37,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2021-01-06 11:34:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:37,782 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 11:34:37,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 11:34:37,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 11:34:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 11:34:37,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:37,782 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:37,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:37,991 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 19 times [2021-01-06 11:34:37,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:37,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455691277] [2021-01-06 11:34:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:39,373 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 11:34:39,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455691277] [2021-01-06 11:34:39,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643034909] [2021-01-06 11:34:39,373 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 11:34:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:39,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 11:34:39,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:40,271 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 11:34:40,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:40,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 11:34:40,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710539645] [2021-01-06 11:34:40,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 11:34:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 11:34:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 11:34:40,273 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2021-01-06 11:34:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:41,391 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-01-06 11:34:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 11:34:41,392 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2021-01-06 11:34:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:41,393 INFO L225 Difference]: With dead ends: 50 [2021-01-06 11:34:41,393 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 11:34:41,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 11:34:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 11:34:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 11:34:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 11:34:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 11:34:41,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2021-01-06 11:34:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:41,403 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 11:34:41,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 11:34:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 11:34:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 11:34:41,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:41,404 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:41,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:41,615 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 20 times [2021-01-06 11:34:41,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:41,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403196717] [2021-01-06 11:34:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:43,140 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 11:34:43,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403196717] [2021-01-06 11:34:43,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835556146] [2021-01-06 11:34:43,141 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 11:34:43,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:34:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:43,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 11:34:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:44,144 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 11:34:44,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:44,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 11:34:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550497643] [2021-01-06 11:34:44,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 11:34:44,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 11:34:44,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 11:34:44,146 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2021-01-06 11:34:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:45,419 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 11:34:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 11:34:45,424 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2021-01-06 11:34:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:45,425 INFO L225 Difference]: With dead ends: 52 [2021-01-06 11:34:45,425 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:34:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 11:34:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:34:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 11:34:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 11:34:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-01-06 11:34:45,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2021-01-06 11:34:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:45,432 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-01-06 11:34:45,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 11:34:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-01-06 11:34:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:34:45,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:45,433 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:45,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:34:45,647 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 21 times [2021-01-06 11:34:45,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:45,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957856624] [2021-01-06 11:34:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:47,245 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 11:34:47,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957856624] [2021-01-06 11:34:47,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564602997] [2021-01-06 11:34:47,246 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 11:34:50,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 11:34:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:50,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 110 conjunts are in the unsatisfiable core [2021-01-06 11:34:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:51,696 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 11:34:51,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:51,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 11:34:51,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138895070] [2021-01-06 11:34:51,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 11:34:51,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 11:34:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:34:51,699 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2021-01-06 11:34:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:53,064 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-01-06 11:34:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 11:34:53,067 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2021-01-06 11:34:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:53,068 INFO L225 Difference]: With dead ends: 54 [2021-01-06 11:34:53,068 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:34:53,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:34:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:34:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 11:34:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:34:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-01-06 11:34:53,075 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2021-01-06 11:34:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:53,076 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-01-06 11:34:53,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 11:34:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-01-06 11:34:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:34:53,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:53,077 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:53,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:34:53,283 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 22 times [2021-01-06 11:34:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:53,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395343399] [2021-01-06 11:34:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:55,035 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 11:34:55,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395343399] [2021-01-06 11:34:55,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269074917] [2021-01-06 11:34:55,036 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 11:34:55,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:34:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:55,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 112 conjunts are in the unsatisfiable core [2021-01-06 11:34:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:56,416 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 11:34:56,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:56,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 11:34:56,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670088470] [2021-01-06 11:34:56,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 11:34:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 11:34:56,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 11:34:56,419 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2021-01-06 11:34:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:57,938 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-01-06 11:34:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 11:34:57,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2021-01-06 11:34:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:57,940 INFO L225 Difference]: With dead ends: 56 [2021-01-06 11:34:57,940 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 11:34:57,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 23 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 11:34:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 11:34:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-01-06 11:34:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:34:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-01-06 11:34:57,947 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2021-01-06 11:34:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:57,947 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-01-06 11:34:57,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 11:34:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-01-06 11:34:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:34:57,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:57,948 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:58,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:58,155 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 23 times [2021-01-06 11:34:58,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:58,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590045761] [2021-01-06 11:34:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:35:00,047 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 11:35:00,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590045761] [2021-01-06 11:35:00,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166279032] [2021-01-06 11:35:00,048 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 11:37:44,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 11:37:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:37:44,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 136 conjunts are in the unsatisfiable core [2021-01-06 11:37:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:37:46,525 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 11:37:46,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:37:46,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 11:37:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233925581] [2021-01-06 11:37:46,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 11:37:46,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:37:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 11:37:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:37:46,527 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2021-01-06 11:37:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:37:48,222 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 11:37:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 11:37:48,223 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2021-01-06 11:37:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:37:48,224 INFO L225 Difference]: With dead ends: 58 [2021-01-06 11:37:48,224 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:37:48,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 44 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:37:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:37:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 11:37:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 11:37:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-01-06 11:37:48,229 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2021-01-06 11:37:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:37:48,230 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-01-06 11:37:48,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 11:37:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-01-06 11:37:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:37:48,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:37:48,231 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2021-01-06 11:37:48,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:37:48,436 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:37:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:37:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 24 times [2021-01-06 11:37:48,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:37:48,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531721004] [2021-01-06 11:37:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:37:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:37:50,527 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 11:37:50,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531721004] [2021-01-06 11:37:50,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346938543] [2021-01-06 11:37:50,528 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 11:38:12,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 11:38:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:38:12,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 128 conjunts are in the unsatisfiable core [2021-01-06 11:38:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:38:14,376 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 11:38:14,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:38:14,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 11:38:14,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090038977] [2021-01-06 11:38:14,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 11:38:14,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:38:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 11:38:14,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 11:38:14,378 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2021-01-06 11:38:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:38:16,230 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-01-06 11:38:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 11:38:16,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2021-01-06 11:38:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:38:16,231 INFO L225 Difference]: With dead ends: 60 [2021-01-06 11:38:16,232 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 11:38:16,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 11:38:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 11:38:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-06 11:38:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 11:38:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-01-06 11:38:16,240 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2021-01-06 11:38:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:38:16,240 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-01-06 11:38:16,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 11:38:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-01-06 11:38:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 11:38:16,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:38:16,243 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2021-01-06 11:38:16,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:38:16,443 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:38:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:38:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 25 times [2021-01-06 11:38:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:38:16,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089006088] [2021-01-06 11:38:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:38:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:38:18,718 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 11:38:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089006088] [2021-01-06 11:38:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481041833] [2021-01-06 11:38:18,719 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 11:38:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:38:18,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 131 conjunts are in the unsatisfiable core [2021-01-06 11:38:18,786 INFO L286 TraceCheckSpWp]: Computing forward predicates...