/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/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:00:14,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:00:14,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:00:14,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:00:14,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:00:14,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:00:14,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:00:14,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:00:14,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:00:14,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:00:14,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:00:14,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:00:14,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:00:14,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:00:14,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:00:14,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:00:14,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:00:14,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:00:14,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:00:14,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:00:14,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:00:14,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:00:14,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:00:14,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:00:14,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:00:14,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:00:14,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:00:14,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:00:14,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:00:14,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:00:14,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:00:14,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:00:14,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:00:14,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:00:14,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:00:14,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:00:14,719 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 17:00:14,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:00:14,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:00:14,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:00:14,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:00:14,777 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:00:14,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:00:14,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:00:14,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:00:14,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:00:14,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:00:14,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:00:14,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:00:14,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:00:14,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:00:14,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:00:14,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:00:14,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:00:14,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:00:14,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:00:14,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:00:14,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:00:14,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:00:14,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:00:14,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:00:14,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:00:14,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:00:15,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:00:15,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:00:15,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:00:15,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:00:15,222 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:00:15,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-01-06 17:00:15,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2afc83eed/ed1849016e884a90b017da4e53f05620/FLAG998082706 [2021-01-06 17:00:16,008 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:00:16,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-01-06 17:00:16,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2afc83eed/ed1849016e884a90b017da4e53f05620/FLAG998082706 [2021-01-06 17:00:16,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2afc83eed/ed1849016e884a90b017da4e53f05620 [2021-01-06 17:00:16,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:00:16,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:00:16,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:00:16,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:00:16,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:00:16,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0e67ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16, skipping insertion in model container [2021-01-06 17:00:16,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:00:16,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:00:16,603 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/loops-crafted-1/mono-crafted_1.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:00:16,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:00:16,636 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:00:16,647 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/loops-crafted-1/mono-crafted_1.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:00:16,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:00:16,668 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:00:16,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16 WrapperNode [2021-01-06 17:00:16,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:00:16,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:00:16,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:00:16,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:00:16,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:00:16,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:00:16,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:00:16,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:00:16,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (1/1) ... [2021-01-06 17:00:16,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:00:16,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:00:16,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:00:16,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:00:16,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (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 17:00:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:00:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:00:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:00:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:00:17,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:00:17,135 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 17:00:17,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:00:17 BoogieIcfgContainer [2021-01-06 17:00:17,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:00:17,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:00:17,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:00:17,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:00:17,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:00:16" (1/3) ... [2021-01-06 17:00:17,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673252e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:00:17, skipping insertion in model container [2021-01-06 17:00:17,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:00:16" (2/3) ... [2021-01-06 17:00:17,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673252e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:00:17, skipping insertion in model container [2021-01-06 17:00:17,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:00:17" (3/3) ... [2021-01-06 17:00:17,154 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2021-01-06 17:00:17,163 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:00:17,169 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:00:17,194 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:00:17,240 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:00:17,240 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:00:17,240 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:00:17,240 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:00:17,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:00:17,241 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:00:17,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:00:17,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:00:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 17:00:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:00:17,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-01-06 17:00:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404326297] [2021-01-06 17:00:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:17,512 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 17:00:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404326297] [2021-01-06 17:00:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:17,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:00:17,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256296281] [2021-01-06 17:00:17,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:00:17,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:00:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:00:17,546 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-01-06 17:00:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:17,566 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-01-06 17:00:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:00:17,567 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:00:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:17,583 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:00:17,583 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 17:00:17,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:00:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 17:00:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 17:00:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 17:00:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-01-06 17:00:17,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-01-06 17:00:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:17,630 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-01-06 17:00:17,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:00:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-01-06 17:00:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:00:17,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:00:17,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-01-06 17:00:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854450788] [2021-01-06 17:00:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:17,777 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 17:00:17,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854450788] [2021-01-06 17:00:17,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:17,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:00:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439186692] [2021-01-06 17:00:17,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:00:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:00:17,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:00:17,783 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 3 states. [2021-01-06 17:00:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:17,847 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-01-06 17:00:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:00:17,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 17:00:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:17,849 INFO L225 Difference]: With dead ends: 18 [2021-01-06 17:00:17,850 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 17:00:17,851 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 17:00:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 17:00:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 17:00:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 17:00:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 17:00:17,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-01-06 17:00:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:17,865 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 17:00:17,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:00:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 17:00:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:00:17,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:17,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:17,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:00:17,892 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-01-06 17:00:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:17,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239109698] [2021-01-06 17:00:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:18,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239109698] [2021-01-06 17:00:18,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:18,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:00:18,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989410612] [2021-01-06 17:00:18,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:00:18,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:00:18,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:00:18,006 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2021-01-06 17:00:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,019 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-01-06 17:00:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:00:18,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 17:00:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,020 INFO L225 Difference]: With dead ends: 16 [2021-01-06 17:00:18,021 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 17:00:18,021 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 17:00:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 17:00:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 17:00:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 17:00:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 17:00:18,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-01-06 17:00:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,025 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 17:00:18,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:00:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 17:00:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:00:18,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:18,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:00:18,027 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-01-06 17:00:18,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:18,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862306491] [2021-01-06 17:00:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:18,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862306491] [2021-01-06 17:00:18,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394997161] [2021-01-06 17:00:18,066 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 17:00:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:00:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:18,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:18,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 17:00:18,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326858001] [2021-01-06 17:00:18,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:00:18,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:00:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:00:18,223 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2021-01-06 17:00:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,265 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-01-06 17:00:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:00:18,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 17:00:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,268 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:00:18,268 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 17:00:18,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:00:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 17:00:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 17:00:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 17:00:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 17:00:18,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-01-06 17:00:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,279 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 17:00:18,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:00:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 17:00:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:00:18,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:18,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:18,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2021-01-06 17:00:18,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:18,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568846057] [2021-01-06 17:00:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:18,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568846057] [2021-01-06 17:00:18,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:00:18,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:00:18,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018618632] [2021-01-06 17:00:18,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:00:18,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:00:18,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:00:18,538 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2021-01-06 17:00:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,562 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 17:00:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:00:18,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 17:00:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,564 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:00:18,564 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:00:18,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:00:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:00:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 17:00:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:00:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 17:00:18,575 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-01-06 17:00:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 17:00:18,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:00:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 17:00:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:00:18,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,578 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:18,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 17:00:18,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2021-01-06 17:00:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:18,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493408461] [2021-01-06 17:00:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:18,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493408461] [2021-01-06 17:00:18,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053727449] [2021-01-06 17:00:18,686 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 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 17:00:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:00:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:18,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 17:00:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265195130] [2021-01-06 17:00:18,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:00:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:00:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:00:18,799 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2021-01-06 17:00:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:18,845 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-01-06 17:00:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:00:18,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 17:00:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:18,848 INFO L225 Difference]: With dead ends: 26 [2021-01-06 17:00:18,851 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:00:18,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:00:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:00:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:00:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:00:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 17:00:18,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-01-06 17:00:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:18,860 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 17:00:18,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:00:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 17:00:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:00:18,864 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:18,865 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:19,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:19,066 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2021-01-06 17:00:19,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51003655] [2021-01-06 17:00:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:19,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51003655] [2021-01-06 17:00:19,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101746935] [2021-01-06 17:00:19,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:00:19,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:19,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:19,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 17:00:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534760980] [2021-01-06 17:00:19,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:00:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:00:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:19,215 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2021-01-06 17:00:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:19,245 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-01-06 17:00:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:00:19,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 17:00:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:19,246 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:00:19,246 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:00:19,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:00:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:00:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 17:00:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:00:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 17:00:19,252 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-01-06 17:00:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:19,252 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 17:00:19,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:00:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 17:00:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:00:19,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:19,254 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:19,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:19,469 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2021-01-06 17:00:19,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:19,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864289645] [2021-01-06 17:00:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:00:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864289645] [2021-01-06 17:00:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708566945] [2021-01-06 17:00:19,529 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 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 17:00:19,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:00:19,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 17:00:19,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:19,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-01-06 17:00:19,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432245877] [2021-01-06 17:00:19,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:19,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:19,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:19,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:19,671 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2021-01-06 17:00:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:19,776 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-01-06 17:00:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:19,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2021-01-06 17:00:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:19,777 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:00:19,777 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:00:19,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:00:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:00:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-01-06 17:00:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:00:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 17:00:19,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-01-06 17:00:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:19,784 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 17:00:19,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 17:00:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:00:19,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:19,785 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:20,001 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2021-01-06 17:00:20,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045599268] [2021-01-06 17:00:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:20,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045599268] [2021-01-06 17:00:20,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541964797] [2021-01-06 17:00:20,075 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 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 17:00:20,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:20,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:20,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 17:00:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837801053] [2021-01-06 17:00:20,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:00:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:00:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:20,166 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2021-01-06 17:00:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:20,197 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-01-06 17:00:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:00:20,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 17:00:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:20,198 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:00:20,198 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:00:20,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:00:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:00:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 17:00:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:00:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 17:00:20,203 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-01-06 17:00:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:20,204 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 17:00:20,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:00:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 17:00:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:00:20,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:20,205 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:20,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2021-01-06 17:00:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064401316] [2021-01-06 17:00:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064401316] [2021-01-06 17:00:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352878503] [2021-01-06 17:00:20,490 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 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 17:00:20,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:00:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:20,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:20,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 17:00:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140209382] [2021-01-06 17:00:20,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:00:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:00:20,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:00:20,602 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2021-01-06 17:00:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:20,637 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-01-06 17:00:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:00:20,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2021-01-06 17:00:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:20,638 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:00:20,638 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:00:20,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:00:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:00:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 17:00:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:00:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 17:00:20,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-01-06 17:00:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:20,643 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 17:00:20,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:00:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 17:00:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:00:20,644 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:20,644 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:20,860 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2021-01-06 17:00:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13464165] [2021-01-06 17:00:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:00:20,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13464165] [2021-01-06 17:00:20,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155839639] [2021-01-06 17:00:20,944 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 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 17:00:20,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:00:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:00:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:21,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:21,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-01-06 17:00:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737267740] [2021-01-06 17:00:21,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:21,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:21,079 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2021-01-06 17:00:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:21,220 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-01-06 17:00:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:00:21,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2021-01-06 17:00:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:21,221 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:00:21,221 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:21,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 17:00:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:00:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-06 17:00:21,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-01-06 17:00:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:21,227 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-06 17:00:21,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-06 17:00:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:00:21,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:21,229 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:21,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:21,444 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2021-01-06 17:00:21,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:21,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943322452] [2021-01-06 17:00:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:21,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943322452] [2021-01-06 17:00:21,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977671872] [2021-01-06 17:00:21,568 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 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 17:00:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:00:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:21,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:21,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 17:00:21,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401435388] [2021-01-06 17:00:21,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:00:21,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:00:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:00:21,673 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2021-01-06 17:00:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:21,734 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:00:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:00:21,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2021-01-06 17:00:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:21,735 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:00:21,735 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:00:21,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:00:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:00:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 17:00:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:00:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 17:00:21,741 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-01-06 17:00:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:21,741 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 17:00:21,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:00:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 17:00:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:00:21,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:21,743 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:21,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:00:21,958 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2021-01-06 17:00:21,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:21,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327377517] [2021-01-06 17:00:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327377517] [2021-01-06 17:00:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590516666] [2021-01-06 17:00:22,066 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 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 17:00:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:00:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:22,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 17:00:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959170382] [2021-01-06 17:00:22,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:22,205 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2021-01-06 17:00:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:22,264 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 17:00:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:22,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2021-01-06 17:00:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:22,265 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:00:22,265 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:00:22,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:00:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 17:00:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:00:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 17:00:22,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-01-06 17:00:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:22,271 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 17:00:22,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 17:00:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:00:22,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:22,272 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:22,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:22,486 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2021-01-06 17:00:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:22,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629468724] [2021-01-06 17:00:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629468724] [2021-01-06 17:00:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247495653] [2021-01-06 17:00:22,616 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 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 17:00:22,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:00:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:22,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:00:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-01-06 17:00:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2021-01-06 17:00:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267854175] [2021-01-06 17:00:22,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:00:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:00:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:00:22,785 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2021-01-06 17:00:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:23,042 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-01-06 17:00:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:00:23,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 17:00:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:23,043 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:00:23,043 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:23,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-01-06 17:00:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:00:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 17:00:23,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2021-01-06 17:00:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:23,050 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 17:00:23,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:00:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 17:00:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:00:23,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:23,051 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:23,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:23,265 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2021-01-06 17:00:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:23,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823026613] [2021-01-06 17:00:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:00:23,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823026613] [2021-01-06 17:00:23,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942363356] [2021-01-06 17:00:23,440 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 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 17:00:23,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:23,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:00:23,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:00:23,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:23,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 17:00:23,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268269212] [2021-01-06 17:00:23,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:00:23,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:00:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:23,566 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2021-01-06 17:00:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:23,648 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-01-06 17:00:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:00:23,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2021-01-06 17:00:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:23,649 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:00:23,649 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:00:23,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:00:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:00:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:00:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 17:00:23,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-01-06 17:00:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:23,656 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 17:00:23,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:00:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 17:00:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:00:23,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:23,657 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:23,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:00:23,871 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2021-01-06 17:00:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:23,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283799212] [2021-01-06 17:00:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:00:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283799212] [2021-01-06 17:00:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489679350] [2021-01-06 17:00:24,038 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 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 17:00:24,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 17:00:24,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:00:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:00:24,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 17:00:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741818091] [2021-01-06 17:00:24,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:24,155 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2021-01-06 17:00:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:24,216 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 17:00:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:24,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2021-01-06 17:00:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:24,220 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:00:24,220 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:00:24,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:00:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 17:00:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 17:00:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 17:00:24,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-01-06 17:00:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:24,239 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 17:00:24,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 17:00:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:00:24,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:24,244 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:24,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:00:24,459 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2021-01-06 17:00:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:24,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660331672] [2021-01-06 17:00:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:00:24,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660331672] [2021-01-06 17:00:24,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806585146] [2021-01-06 17:00:24,689 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 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 17:00:24,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:00:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:00:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 17:00:24,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:24,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2021-01-06 17:00:24,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624795076] [2021-01-06 17:00:24,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:00:24,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:00:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:24,915 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 21 states. [2021-01-06 17:00:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,248 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-01-06 17:00:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:00:25,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2021-01-06 17:00:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,252 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:00:25,253 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:00:25,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=770, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:00:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:00:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-01-06 17:00:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:00:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-01-06 17:00:25,274 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2021-01-06 17:00:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,274 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-01-06 17:00:25,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:00:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-01-06 17:00:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:25,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,278 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:25,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:00:25,496 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2021-01-06 17:00:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:25,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269555200] [2021-01-06 17:00:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:25,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269555200] [2021-01-06 17:00:25,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681352394] [2021-01-06 17:00:25,690 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 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 17:00:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:00:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:25,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:25,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 17:00:25,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920542772] [2021-01-06 17:00:25,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:25,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:25,833 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2021-01-06 17:00:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,906 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-01-06 17:00:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:00:25,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2021-01-06 17:00:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,907 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:00:25,907 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:00:25,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:00:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 17:00:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 17:00:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 17:00:25,912 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-01-06 17:00:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,913 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 17:00:25,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 17:00:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:00:25,914 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,914 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:26,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:26,128 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2021-01-06 17:00:26,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:26,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249127543] [2021-01-06 17:00:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:26,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249127543] [2021-01-06 17:00:26,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539003213] [2021-01-06 17:00:26,323 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 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 17:00:26,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:00:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:26,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:26,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 17:00:26,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799223468] [2021-01-06 17:00:26,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:00:26,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:00:26,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:00:26,463 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 19 states. [2021-01-06 17:00:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:26,518 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-01-06 17:00:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:00:26,518 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2021-01-06 17:00:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:26,519 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:00:26,519 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:00:26,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:00:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:00:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 17:00:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 17:00:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-01-06 17:00:26,526 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-01-06 17:00:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-01-06 17:00:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:00:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-01-06 17:00:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:00:26,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:26,527 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:26,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:26,741 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2021-01-06 17:00:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049856070] [2021-01-06 17:00:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:26,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049856070] [2021-01-06 17:00:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251124116] [2021-01-06 17:00:26,972 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 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 17:00:27,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:00:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:00:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-01-06 17:00:27,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2021-01-06 17:00:27,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777136328] [2021-01-06 17:00:27,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:00:27,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:00:27,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:27,097 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 21 states. [2021-01-06 17:00:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:27,186 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-01-06 17:00:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:00:27,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2021-01-06 17:00:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:27,188 INFO L225 Difference]: With dead ends: 65 [2021-01-06 17:00:27,188 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:00:27,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:00:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-01-06 17:00:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:00:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-01-06 17:00:27,195 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2021-01-06 17:00:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:27,195 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-01-06 17:00:27,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:00:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-01-06 17:00:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:00:27,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:27,196 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:27,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:27,411 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2021-01-06 17:00:27,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:27,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223710798] [2021-01-06 17:00:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:00:27,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223710798] [2021-01-06 17:00:27,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009222447] [2021-01-06 17:00:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:00:27,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:00:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:00:27,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 17:00:27,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518373847] [2021-01-06 17:00:27,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:00:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:00:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:27,844 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 21 states. [2021-01-06 17:00:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:27,904 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-01-06 17:00:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:00:27,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2021-01-06 17:00:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:27,905 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:00:27,905 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 17:00:27,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 17:00:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 17:00:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:00:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-01-06 17:00:27,911 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2021-01-06 17:00:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:27,911 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-01-06 17:00:27,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:00:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-01-06 17:00:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 17:00:27,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:27,912 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:28,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:00:28,128 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2021-01-06 17:00:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:28,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828592128] [2021-01-06 17:00:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:00:28,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828592128] [2021-01-06 17:00:28,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994148021] [2021-01-06 17:00:28,434 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 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 17:00:28,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 17:00:28,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:00:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:00:28,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:28,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 17:00:28,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160236759] [2021-01-06 17:00:28,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:00:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:00:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:28,605 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 22 states. [2021-01-06 17:00:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:28,704 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-01-06 17:00:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:00:28,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-01-06 17:00:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:28,708 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:00:28,708 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:00:28,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:00:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 17:00:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 17:00:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-01-06 17:00:28,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-01-06 17:00:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:28,724 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-01-06 17:00:28,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:00:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-01-06 17:00:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 17:00:28,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:28,725 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:28,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:00:28,938 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:28,939 INFO L82 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2021-01-06 17:00:28,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:28,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915764970] [2021-01-06 17:00:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:00:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915764970] [2021-01-06 17:00:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251653579] [2021-01-06 17:00:29,330 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 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 17:00:29,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:00:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-01-06 17:00:29,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2021-01-06 17:00:29,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668588080] [2021-01-06 17:00:29,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:00:29,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:00:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:29,600 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 28 states. [2021-01-06 17:00:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:30,219 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-01-06 17:00:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:00:30,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2021-01-06 17:00:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:30,220 INFO L225 Difference]: With dead ends: 79 [2021-01-06 17:00:30,220 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:00:30,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=778, Invalid=1478, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:00:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:00:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-01-06 17:00:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 17:00:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-01-06 17:00:30,226 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 54 [2021-01-06 17:00:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:30,226 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-01-06 17:00:30,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:00:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-01-06 17:00:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 17:00:30,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:30,227 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:30,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:00:30,441 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2021-01-06 17:00:30,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:30,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050057193] [2021-01-06 17:00:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:00:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050057193] [2021-01-06 17:00:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485868058] [2021-01-06 17:00:30,799 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 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 17:00:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:00:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:00:30,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:30,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:00:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716153009] [2021-01-06 17:00:30,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:00:30,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:30,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:00:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:30,968 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 24 states. [2021-01-06 17:00:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:31,063 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-01-06 17:00:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:00:31,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2021-01-06 17:00:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:31,064 INFO L225 Difference]: With dead ends: 76 [2021-01-06 17:00:31,065 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:00:31,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:00:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 17:00:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:00:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-01-06 17:00:31,070 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2021-01-06 17:00:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:31,070 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-01-06 17:00:31,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:00:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-01-06 17:00:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 17:00:31,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:31,071 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:31,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:00:31,286 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2021-01-06 17:00:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:31,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128643564] [2021-01-06 17:00:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:00:31,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128643564] [2021-01-06 17:00:31,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189473787] [2021-01-06 17:00:31,652 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 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 17:00:31,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:00:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:00:31,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:31,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:00:31,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120071766] [2021-01-06 17:00:31,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:00:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:00:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:31,798 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 25 states. [2021-01-06 17:00:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:31,922 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-01-06 17:00:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:00:31,923 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2021-01-06 17:00:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:31,924 INFO L225 Difference]: With dead ends: 78 [2021-01-06 17:00:31,924 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:00:31,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:00:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-01-06 17:00:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 17:00:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-01-06 17:00:31,929 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2021-01-06 17:00:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:31,930 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-01-06 17:00:31,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:00:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-01-06 17:00:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 17:00:31,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:31,931 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:32,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:00:32,144 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2021-01-06 17:00:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:32,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037157416] [2021-01-06 17:00:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:00:32,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037157416] [2021-01-06 17:00:32,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411940241] [2021-01-06 17:00:32,525 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 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 17:00:32,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:00:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:00:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-01-06 17:00:32,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:32,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 17:00:32,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196491089] [2021-01-06 17:00:32,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:00:32,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:00:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:00:32,859 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 32 states. [2021-01-06 17:00:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:33,656 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-01-06 17:00:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:00:33,657 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2021-01-06 17:00:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:33,657 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:00:33,657 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 17:00:33,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1025, Invalid=1945, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:00:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 17:00:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-01-06 17:00:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 17:00:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-01-06 17:00:33,664 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2021-01-06 17:00:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:33,665 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-01-06 17:00:33,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:00:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-01-06 17:00:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 17:00:33,666 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:33,666 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:33,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:33,872 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2021-01-06 17:00:33,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:33,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941949865] [2021-01-06 17:00:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:00:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941949865] [2021-01-06 17:00:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350382429] [2021-01-06 17:00:34,312 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 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 17:00:34,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:00:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:00:34,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:34,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:00:34,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547978824] [2021-01-06 17:00:34,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:00:34,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:00:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:00:34,461 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 27 states. [2021-01-06 17:00:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:34,565 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-01-06 17:00:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:00:34,566 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2021-01-06 17:00:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:34,567 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:00:34,567 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 17:00:34,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:00:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 17:00:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 17:00:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:00:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-01-06 17:00:34,574 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2021-01-06 17:00:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:34,574 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-01-06 17:00:34,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:00:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-01-06 17:00:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:00:34,575 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:34,575 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:34,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:00:34,788 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2021-01-06 17:00:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:34,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701870177] [2021-01-06 17:00:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:00:35,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701870177] [2021-01-06 17:00:35,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864116558] [2021-01-06 17:00:35,263 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 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 17:00:35,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-01-06 17:00:35,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:00:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:00:35,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:35,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 17:00:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579106612] [2021-01-06 17:00:35,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:00:35,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:00:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:35,440 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 28 states. [2021-01-06 17:00:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:35,573 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-01-06 17:00:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:00:35,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2021-01-06 17:00:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:35,574 INFO L225 Difference]: With dead ends: 86 [2021-01-06 17:00:35,574 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 17:00:35,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:00:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 17:00:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 17:00:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 17:00:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-01-06 17:00:35,581 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2021-01-06 17:00:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:35,581 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-01-06 17:00:35,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:00:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-01-06 17:00:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 17:00:35,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:35,582 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:35,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:35,797 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2021-01-06 17:00:35,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:35,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667990234] [2021-01-06 17:00:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:00:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667990234] [2021-01-06 17:00:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896505787] [2021-01-06 17:00:36,231 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 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 17:00:36,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:00:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:00:36,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-01-06 17:00:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2021-01-06 17:00:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962443568] [2021-01-06 17:00:36,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:00:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:00:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:36,640 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 36 states. [2021-01-06 17:00:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:37,579 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-01-06 17:00:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:00:37,580 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 68 [2021-01-06 17:00:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:37,581 INFO L225 Difference]: With dead ends: 95 [2021-01-06 17:00:37,581 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:00:37,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1306, Invalid=2476, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:00:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:00:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-01-06 17:00:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:00:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-01-06 17:00:37,587 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2021-01-06 17:00:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:37,587 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-01-06 17:00:37,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:00:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-01-06 17:00:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 17:00:37,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:37,588 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:37,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:00:37,798 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:37,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2021-01-06 17:00:37,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:37,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122988066] [2021-01-06 17:00:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:00:38,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122988066] [2021-01-06 17:00:38,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639333983] [2021-01-06 17:00:38,237 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:38,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:00:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:00:38,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:38,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 17:00:38,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450045374] [2021-01-06 17:00:38,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:00:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:00:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:00:38,438 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 30 states. [2021-01-06 17:00:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:38,627 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-01-06 17:00:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:00:38,627 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2021-01-06 17:00:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:38,628 INFO L225 Difference]: With dead ends: 92 [2021-01-06 17:00:38,628 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 17:00:38,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:00:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 17:00:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 17:00:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 17:00:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 17:00:38,637 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2021-01-06 17:00:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:38,638 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 17:00:38,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:00:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 17:00:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 17:00:38,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:38,640 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:38,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:38,855 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2021-01-06 17:00:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:38,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452880398] [2021-01-06 17:00:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:00:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452880398] [2021-01-06 17:00:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926831565] [2021-01-06 17:00:39,376 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:39,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:39,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:00:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:00:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 17:00:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029592353] [2021-01-06 17:00:39,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 17:00:39,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 17:00:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:00:39,547 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 31 states. [2021-01-06 17:00:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:39,646 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-01-06 17:00:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:00:39,646 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2021-01-06 17:00:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:39,648 INFO L225 Difference]: With dead ends: 94 [2021-01-06 17:00:39,649 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 17:00:39,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:00:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 17:00:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-06 17:00:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 17:00:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-01-06 17:00:39,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2021-01-06 17:00:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:39,655 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-01-06 17:00:39,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 17:00:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-01-06 17:00:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 17:00:39,656 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:39,656 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:39,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:00:39,871 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2021-01-06 17:00:39,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:39,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003252115] [2021-01-06 17:00:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 17:00:40,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003252115] [2021-01-06 17:00:40,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566590447] [2021-01-06 17:00:40,504 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:40,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:00:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:00:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-01-06 17:00:40,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:40,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 17:00:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756413700] [2021-01-06 17:00:40,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:40,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:40,901 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 40 states. [2021-01-06 17:00:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:42,042 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-01-06 17:00:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:00:42,043 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 75 [2021-01-06 17:00:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:42,044 INFO L225 Difference]: With dead ends: 103 [2021-01-06 17:00:42,044 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 17:00:42,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1621, Invalid=3071, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:00:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 17:00:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-01-06 17:00:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 17:00:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 17:00:42,052 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2021-01-06 17:00:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:42,052 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 17:00:42,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:00:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 17:00:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 17:00:42,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:42,053 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:42,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,266 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2021-01-06 17:00:42,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:42,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128130164] [2021-01-06 17:00:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:00:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128130164] [2021-01-06 17:00:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842047218] [2021-01-06 17:00:42,790 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:00:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:00:42,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:42,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 17:00:42,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478136612] [2021-01-06 17:00:42,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:00:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:00:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:00:42,974 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 33 states. [2021-01-06 17:00:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:43,148 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-01-06 17:00:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:00:43,148 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2021-01-06 17:00:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:43,149 INFO L225 Difference]: With dead ends: 100 [2021-01-06 17:00:43,149 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 17:00:43,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:00:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 17:00:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 17:00:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 17:00:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-01-06 17:00:43,156 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2021-01-06 17:00:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:43,156 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-01-06 17:00:43,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:00:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-01-06 17:00:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 17:00:43,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:43,157 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:43,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:00:43,371 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2021-01-06 17:00:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:43,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942503674] [2021-01-06 17:00:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:00:44,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942503674] [2021-01-06 17:00:44,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356170981] [2021-01-06 17:00:44,089 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:44,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-01-06 17:00:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:00:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:00:44,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:44,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 17:00:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131572855] [2021-01-06 17:00:44,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:00:44,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:00:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:00:44,285 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 34 states. [2021-01-06 17:00:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:44,437 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-01-06 17:00:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 17:00:44,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2021-01-06 17:00:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:44,438 INFO L225 Difference]: With dead ends: 102 [2021-01-06 17:00:44,438 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:00:44,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:00:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:00:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-01-06 17:00:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 17:00:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-01-06 17:00:44,445 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 80 [2021-01-06 17:00:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:44,446 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-01-06 17:00:44,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:00:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-01-06 17:00:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 17:00:44,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:44,447 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:44,661 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2021-01-06 17:00:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:44,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889234106] [2021-01-06 17:00:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:00:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889234106] [2021-01-06 17:00:45,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522318230] [2021-01-06 17:00:45,368 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:45,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 17:00:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:00:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-01-06 17:00:45,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:45,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2021-01-06 17:00:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768131725] [2021-01-06 17:00:45,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:00:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:45,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:00:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:00:45,849 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 44 states. [2021-01-06 17:00:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:47,215 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-01-06 17:00:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:00:47,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 82 [2021-01-06 17:00:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:47,216 INFO L225 Difference]: With dead ends: 111 [2021-01-06 17:00:47,216 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 17:00:47,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1970, Invalid=3730, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:00:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 17:00:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-01-06 17:00:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 17:00:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-01-06 17:00:47,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2021-01-06 17:00:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:47,226 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-01-06 17:00:47,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:00:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-01-06 17:00:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 17:00:47,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:47,227 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:47,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:00:47,443 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2021-01-06 17:00:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:47,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497015785] [2021-01-06 17:00:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:48,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497015785] [2021-01-06 17:00:48,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732106718] [2021-01-06 17:00:48,209 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:00:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:48,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:48,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 17:00:48,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987671096] [2021-01-06 17:00:48,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:00:48,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:48,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:00:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:48,387 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 36 states. [2021-01-06 17:00:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:48,598 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-01-06 17:00:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:00:48,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2021-01-06 17:00:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:48,600 INFO L225 Difference]: With dead ends: 108 [2021-01-06 17:00:48,600 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 17:00:48,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 17:00:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-01-06 17:00:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 17:00:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-01-06 17:00:48,608 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2021-01-06 17:00:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:48,608 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-01-06 17:00:48,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:00:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-01-06 17:00:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 17:00:48,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:48,609 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:48,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:00:48,824 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2021-01-06 17:00:48,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:48,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17341352] [2021-01-06 17:00:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:49,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17341352] [2021-01-06 17:00:49,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358385299] [2021-01-06 17:00:49,526 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:49,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:00:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:49,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:49,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 17:00:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230126438] [2021-01-06 17:00:49,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:00:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:00:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:00:49,705 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 37 states. [2021-01-06 17:00:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:49,907 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-01-06 17:00:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:00:49,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2021-01-06 17:00:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:49,909 INFO L225 Difference]: With dead ends: 110 [2021-01-06 17:00:49,909 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 17:00:49,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:00:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 17:00:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 17:00:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 17:00:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-01-06 17:00:49,915 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2021-01-06 17:00:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:49,915 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-01-06 17:00:49,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:00:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-01-06 17:00:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 17:00:49,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:49,916 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:50,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:00:50,132 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2021-01-06 17:00:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:50,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519980547] [2021-01-06 17:00:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:00:51,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519980547] [2021-01-06 17:00:51,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614648552] [2021-01-06 17:00:51,013 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:51,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:00:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:00:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-01-06 17:00:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2021-01-06 17:00:51,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599014492] [2021-01-06 17:00:51,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:51,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:51,297 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 40 states. [2021-01-06 17:00:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:51,530 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-01-06 17:00:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:00:51,531 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2021-01-06 17:00:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:51,532 INFO L225 Difference]: With dead ends: 115 [2021-01-06 17:00:51,532 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 17:00:51,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 17:00:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 17:00:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 17:00:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-01-06 17:00:51,540 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2021-01-06 17:00:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:51,540 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-01-06 17:00:51,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:00:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-01-06 17:00:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 17:00:51,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:51,541 INFO L422 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:51,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:00:51,755 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2021-01-06 17:00:51,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:51,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747871365] [2021-01-06 17:00:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 17:00:52,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747871365] [2021-01-06 17:00:52,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028889926] [2021-01-06 17:00:52,669 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:52,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:00:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 17:00:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:52,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 17:00:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65528152] [2021-01-06 17:00:52,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:00:52,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:00:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:00:52,871 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2021-01-06 17:00:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:53,084 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-01-06 17:00:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:00:53,085 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 93 [2021-01-06 17:00:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:53,086 INFO L225 Difference]: With dead ends: 118 [2021-01-06 17:00:53,087 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 17:00:53,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:00:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 17:00:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 17:00:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 17:00:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-01-06 17:00:53,096 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-01-06 17:00:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:53,096 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-01-06 17:00:53,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:00:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-01-06 17:00:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 17:00:53,097 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:53,097 INFO L422 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:53,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:00:53,311 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2021-01-06 17:00:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:53,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415791565] [2021-01-06 17:00:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 17:00:54,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415791565] [2021-01-06 17:00:54,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426393697] [2021-01-06 17:00:54,294 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:54,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-01-06 17:00:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:00:54,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 17:00:54,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:54,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 17:00:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021242565] [2021-01-06 17:00:54,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:54,520 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 40 states. [2021-01-06 17:00:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:54,675 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-01-06 17:00:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 17:00:54,675 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 95 [2021-01-06 17:00:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:54,676 INFO L225 Difference]: With dead ends: 120 [2021-01-06 17:00:54,676 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 17:00:54,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 17:00:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-01-06 17:00:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 17:00:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-01-06 17:00:54,684 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2021-01-06 17:00:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:54,684 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-01-06 17:00:54,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:00:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-01-06 17:00:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 17:00:54,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:54,685 INFO L422 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:54,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:00:54,899 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2021-01-06 17:00:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:54,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106084019] [2021-01-06 17:00:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-01-06 17:00:55,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106084019] [2021-01-06 17:00:55,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966318267] [2021-01-06 17:00:55,841 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:55,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 17:00:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:00:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-01-06 17:00:56,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:56,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-01-06 17:00:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327596646] [2021-01-06 17:00:56,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 17:00:56,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:56,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 17:00:56,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:00:56,406 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 51 states. [2021-01-06 17:00:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:58,054 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-01-06 17:00:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 17:00:58,055 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 97 [2021-01-06 17:00:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:58,056 INFO L225 Difference]: With dead ends: 135 [2021-01-06 17:00:58,056 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 17:00:58,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2681, Invalid=5151, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 17:00:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 17:00:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-01-06 17:00:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 17:00:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-01-06 17:00:58,062 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 97 [2021-01-06 17:00:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:58,062 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-01-06 17:00:58,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 17:00:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-01-06 17:00:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 17:00:58,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:58,064 INFO L422 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 17:00:58,267 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2021-01-06 17:00:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781751286] [2021-01-06 17:00:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 17:00:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781751286] [2021-01-06 17:00:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314892906] [2021-01-06 17:00:59,185 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:59,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 17:00:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 17:00:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:59,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 17:00:59,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554775350] [2021-01-06 17:00:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:00:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:00:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:00:59,384 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2021-01-06 17:00:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:59,617 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-01-06 17:00:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 17:00:59,617 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2021-01-06 17:00:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:59,618 INFO L225 Difference]: With dead ends: 126 [2021-01-06 17:00:59,618 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 17:00:59,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:00:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 17:00:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-01-06 17:00:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 17:00:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-01-06 17:00:59,626 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2021-01-06 17:00:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:59,626 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-01-06 17:00:59,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:00:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-01-06 17:00:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 17:00:59,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:59,627 INFO L422 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:59,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:59,840 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2021-01-06 17:00:59,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:59,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147179437] [2021-01-06 17:00:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 17:01:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147179437] [2021-01-06 17:01:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336611560] [2021-01-06 17:01:00,959 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:01,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:01,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:01:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 17:01:01,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:01,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 17:01:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855369902] [2021-01-06 17:01:01,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 17:01:01,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 17:01:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:01:01,156 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 43 states. [2021-01-06 17:01:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:01,312 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-01-06 17:01:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 17:01:01,312 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2021-01-06 17:01:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:01,313 INFO L225 Difference]: With dead ends: 128 [2021-01-06 17:01:01,313 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 17:01:01,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:01:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 17:01:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 17:01:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 17:01:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-01-06 17:01:01,320 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 102 [2021-01-06 17:01:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:01,321 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-01-06 17:01:01,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 17:01:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-01-06 17:01:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 17:01:01,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:01,322 INFO L422 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:01,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:01,532 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2021-01-06 17:01:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:01,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674726457] [2021-01-06 17:01:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 17:01:02,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674726457] [2021-01-06 17:01:02,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629033682] [2021-01-06 17:01:02,515 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:02,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:01:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:01:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-01-06 17:01:03,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:03,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-01-06 17:01:03,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347512629] [2021-01-06 17:01:03,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 17:01:03,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 17:01:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:01:03,223 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 55 states. [2021-01-06 17:01:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:05,196 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-01-06 17:01:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 17:01:05,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2021-01-06 17:01:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:05,198 INFO L225 Difference]: With dead ends: 143 [2021-01-06 17:01:05,198 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 17:01:05,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3125, Invalid=5995, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:01:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 17:01:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-01-06 17:01:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 17:01:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 17:01:05,207 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 104 [2021-01-06 17:01:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:05,208 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 17:01:05,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 17:01:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 17:01:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 17:01:05,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:05,208 INFO L422 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:05,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:05,409 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2021-01-06 17:01:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:05,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829547456] [2021-01-06 17:01:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 17:01:06,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829547456] [2021-01-06 17:01:06,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264472369] [2021-01-06 17:01:06,629 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:06,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:01:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 17:01:06,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:06,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 17:01:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506095422] [2021-01-06 17:01:06,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 17:01:06,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 17:01:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:01:06,852 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 45 states. [2021-01-06 17:01:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:07,117 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-01-06 17:01:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:01:07,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2021-01-06 17:01:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:07,120 INFO L225 Difference]: With dead ends: 134 [2021-01-06 17:01:07,120 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 17:01:07,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:01:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 17:01:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-01-06 17:01:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 17:01:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 17:01:07,128 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-01-06 17:01:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:07,128 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 17:01:07,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 17:01:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 17:01:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 17:01:07,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:07,129 INFO L422 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:07,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 17:01:07,330 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2021-01-06 17:01:07,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:07,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782405435] [2021-01-06 17:01:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 17:01:08,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782405435] [2021-01-06 17:01:08,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928206102] [2021-01-06 17:01:08,601 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:08,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-01-06 17:01:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:01:08,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 17:01:08,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:08,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 17:01:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467595174] [2021-01-06 17:01:08,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 17:01:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 17:01:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:01:08,865 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 46 states. [2021-01-06 17:01:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:09,145 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-01-06 17:01:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 17:01:09,146 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 109 [2021-01-06 17:01:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:09,147 INFO L225 Difference]: With dead ends: 136 [2021-01-06 17:01:09,147 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 17:01:09,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:01:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 17:01:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-01-06 17:01:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 17:01:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-01-06 17:01:09,153 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2021-01-06 17:01:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:09,153 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-01-06 17:01:09,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 17:01:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-01-06 17:01:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 17:01:09,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:09,154 INFO L422 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:09,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,356 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:09,356 INFO L82 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2021-01-06 17:01:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:09,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561905287] [2021-01-06 17:01:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-01-06 17:01:10,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561905287] [2021-01-06 17:01:10,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903646864] [2021-01-06 17:01:10,748 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:10,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 17:01:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:01:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-01-06 17:01:11,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:11,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 15] total 59 [2021-01-06 17:01:11,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129104559] [2021-01-06 17:01:11,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 17:01:11,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 17:01:11,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=2283, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:01:11,481 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 59 states. [2021-01-06 17:01:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:13,890 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-01-06 17:01:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:01:13,890 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 111 [2021-01-06 17:01:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:13,891 INFO L225 Difference]: With dead ends: 151 [2021-01-06 17:01:13,891 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 17:01:13,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3603, Invalid=6903, Unknown=0, NotChecked=0, Total=10506 [2021-01-06 17:01:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 17:01:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-01-06 17:01:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 17:01:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-01-06 17:01:13,902 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 111 [2021-01-06 17:01:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:13,902 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-01-06 17:01:13,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 17:01:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-01-06 17:01:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 17:01:13,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:13,903 INFO L422 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:14,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:14,116 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2021-01-06 17:01:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:14,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025187509] [2021-01-06 17:01:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 17:01:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025187509] [2021-01-06 17:01:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180294874] [2021-01-06 17:01:15,563 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:01:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 17:01:15,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:15,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 17:01:15,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644433188] [2021-01-06 17:01:15,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 17:01:15,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 17:01:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:01:15,801 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 48 states. [2021-01-06 17:01:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:16,021 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-01-06 17:01:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 17:01:16,022 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2021-01-06 17:01:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:16,023 INFO L225 Difference]: With dead ends: 142 [2021-01-06 17:01:16,023 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 17:01:16,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:01:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 17:01:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-01-06 17:01:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 17:01:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-01-06 17:01:16,033 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2021-01-06 17:01:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:16,033 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-01-06 17:01:16,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 17:01:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-01-06 17:01:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-01-06 17:01:16,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:16,034 INFO L422 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:16,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 17:01:16,235 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2021-01-06 17:01:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:16,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153480138] [2021-01-06 17:01:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 17:01:17,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153480138] [2021-01-06 17:01:17,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097862771] [2021-01-06 17:01:17,751 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:01:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 17:01:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 17:01:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487579434] [2021-01-06 17:01:17,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 17:01:17,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 17:01:17,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:01:17,994 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 49 states. [2021-01-06 17:01:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:18,185 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-01-06 17:01:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 17:01:18,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 116 [2021-01-06 17:01:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:18,188 INFO L225 Difference]: With dead ends: 144 [2021-01-06 17:01:18,188 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 17:01:18,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:01:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 17:01:18,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-01-06 17:01:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 17:01:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-01-06 17:01:18,198 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2021-01-06 17:01:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:18,198 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-01-06 17:01:18,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 17:01:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-01-06 17:01:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 17:01:18,199 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:18,199 INFO L422 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:18,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 17:01:18,413 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2021-01-06 17:01:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:18,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075754978] [2021-01-06 17:01:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 17:01:19,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075754978] [2021-01-06 17:01:19,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74334400] [2021-01-06 17:01:19,866 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:01:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-01-06 17:01:20,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:20,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16] total 63 [2021-01-06 17:01:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159574464] [2021-01-06 17:01:20,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 17:01:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 17:01:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=2611, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:01:20,650 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 63 states. [2021-01-06 17:01:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:23,060 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-01-06 17:01:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 17:01:23,061 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2021-01-06 17:01:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:23,062 INFO L225 Difference]: With dead ends: 159 [2021-01-06 17:01:23,062 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 17:01:23,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4115, Invalid=7875, Unknown=0, NotChecked=0, Total=11990 [2021-01-06 17:01:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 17:01:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-01-06 17:01:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 17:01:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-01-06 17:01:23,073 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 118 [2021-01-06 17:01:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:23,073 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-01-06 17:01:23,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 17:01:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-01-06 17:01:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 17:01:23,074 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:23,074 INFO L422 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:23,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 17:01:23,289 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2021-01-06 17:01:23,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:23,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123411884] [2021-01-06 17:01:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 17:01:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123411884] [2021-01-06 17:01:24,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306319377] [2021-01-06 17:01:24,874 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:24,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:24,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:01:24,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 17:01:25,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:25,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 17:01:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067986182] [2021-01-06 17:01:25,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 17:01:25,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:25,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 17:01:25,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:01:25,122 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 51 states. [2021-01-06 17:01:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:25,343 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-01-06 17:01:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:01:25,344 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 121 [2021-01-06 17:01:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:25,345 INFO L225 Difference]: With dead ends: 150 [2021-01-06 17:01:25,345 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 17:01:25,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:01:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 17:01:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-01-06 17:01:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 17:01:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-01-06 17:01:25,356 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-01-06 17:01:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:25,356 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-01-06 17:01:25,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 17:01:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-01-06 17:01:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 17:01:25,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:25,357 INFO L422 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:25,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:25,571 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2021-01-06 17:01:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:25,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68781182] [2021-01-06 17:01:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 17:01:27,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68781182] [2021-01-06 17:01:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958329643] [2021-01-06 17:01:27,221 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:27,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-01-06 17:01:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:01:27,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 17:01:27,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:27,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 17:01:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473036772] [2021-01-06 17:01:27,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 17:01:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 17:01:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:01:27,508 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 52 states. [2021-01-06 17:01:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:27,790 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-01-06 17:01:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 17:01:27,790 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2021-01-06 17:01:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:27,792 INFO L225 Difference]: With dead ends: 152 [2021-01-06 17:01:27,792 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 17:01:27,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:01:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 17:01:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-01-06 17:01:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 17:01:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-01-06 17:01:27,803 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-01-06 17:01:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:27,803 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-01-06 17:01:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 17:01:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-01-06 17:01:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 17:01:27,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:27,804 INFO L422 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:28,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:28,019 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2021-01-06 17:01:28,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:28,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848235072] [2021-01-06 17:01:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-01-06 17:01:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848235072] [2021-01-06 17:01:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164762405] [2021-01-06 17:01:29,702 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:29,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 17:01:29,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:01:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-01-06 17:01:30,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:30,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2021-01-06 17:01:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324616064] [2021-01-06 17:01:30,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 17:01:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 17:01:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 17:01:30,735 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 67 states. [2021-01-06 17:01:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:33,742 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-01-06 17:01:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 17:01:33,743 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 125 [2021-01-06 17:01:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:33,744 INFO L225 Difference]: With dead ends: 167 [2021-01-06 17:01:33,744 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 17:01:33,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4661, Invalid=8911, Unknown=0, NotChecked=0, Total=13572 [2021-01-06 17:01:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 17:01:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-01-06 17:01:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 17:01:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-01-06 17:01:33,756 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 125 [2021-01-06 17:01:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:33,757 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-01-06 17:01:33,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 17:01:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-01-06 17:01:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 17:01:33,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:33,758 INFO L422 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:33,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 17:01:33,974 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2021-01-06 17:01:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:33,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443765429] [2021-01-06 17:01:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 17:01:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443765429] [2021-01-06 17:01:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363721593] [2021-01-06 17:01:35,842 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 17:01:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 17:01:36,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:36,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 17:01:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444936667] [2021-01-06 17:01:36,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 17:01:36,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 17:01:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:01:36,101 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 54 states. [2021-01-06 17:01:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:36,316 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-01-06 17:01:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 17:01:36,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2021-01-06 17:01:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:36,318 INFO L225 Difference]: With dead ends: 158 [2021-01-06 17:01:36,318 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 17:01:36,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:01:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 17:01:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-01-06 17:01:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 17:01:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-01-06 17:01:36,329 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 128 [2021-01-06 17:01:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:36,329 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-01-06 17:01:36,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 17:01:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-01-06 17:01:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 17:01:36,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:36,330 INFO L422 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:36,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:36,544 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2021-01-06 17:01:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:36,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198495600] [2021-01-06 17:01:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 17:01:38,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198495600] [2021-01-06 17:01:38,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174757288] [2021-01-06 17:01:38,291 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:38,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:01:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 17:01:38,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:38,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 17:01:38,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743814743] [2021-01-06 17:01:38,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 17:01:38,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 17:01:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:01:38,548 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 55 states. [2021-01-06 17:01:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:38,885 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-01-06 17:01:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 17:01:38,886 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 130 [2021-01-06 17:01:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:38,888 INFO L225 Difference]: With dead ends: 160 [2021-01-06 17:01:38,888 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 17:01:38,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 17:01:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 17:01:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-01-06 17:01:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 17:01:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-01-06 17:01:38,899 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 130 [2021-01-06 17:01:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:38,899 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-01-06 17:01:38,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 17:01:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-01-06 17:01:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 17:01:38,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:38,900 INFO L422 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:39,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 17:01:39,115 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2021-01-06 17:01:39,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:39,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783002603] [2021-01-06 17:01:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 17:01:41,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783002603] [2021-01-06 17:01:41,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969742234] [2021-01-06 17:01:41,057 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:41,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 17:01:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:01:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-01-06 17:01:41,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:41,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2021-01-06 17:01:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489493166] [2021-01-06 17:01:41,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 17:01:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 17:01:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:01:41,545 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 59 states. [2021-01-06 17:01:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:41,901 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-01-06 17:01:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:01:41,902 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2021-01-06 17:01:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:41,903 INFO L225 Difference]: With dead ends: 165 [2021-01-06 17:01:41,903 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 17:01:41,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:01:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 17:01:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-01-06 17:01:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 17:01:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-01-06 17:01:41,915 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 132 [2021-01-06 17:01:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:41,915 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-01-06 17:01:41,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 17:01:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-01-06 17:01:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 17:01:41,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:41,916 INFO L422 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:42,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 17:01:42,132 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2021-01-06 17:01:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:42,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206191560] [2021-01-06 17:01:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 17:01:44,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206191560] [2021-01-06 17:01:44,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86396850] [2021-01-06 17:01:44,264 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:44,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:01:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 17:01:44,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:44,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 17:01:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607545579] [2021-01-06 17:01:44,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 17:01:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 17:01:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:01:44,542 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 57 states. [2021-01-06 17:01:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:44,811 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-01-06 17:01:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 17:01:44,813 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 136 [2021-01-06 17:01:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:44,814 INFO L225 Difference]: With dead ends: 168 [2021-01-06 17:01:44,814 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 17:01:44,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:01:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 17:01:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-01-06 17:01:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 17:01:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-01-06 17:01:44,826 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2021-01-06 17:01:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:44,827 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-01-06 17:01:44,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 17:01:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-01-06 17:01:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 17:01:44,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:44,828 INFO L422 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:45,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 17:01:45,043 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2021-01-06 17:01:45,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:45,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420052294] [2021-01-06 17:01:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 17:01:47,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420052294] [2021-01-06 17:01:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038596645] [2021-01-06 17:01:47,128 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:47,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-01-06 17:01:47,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:47,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 17:01:47,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 17:01:47,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:47,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 17:01:47,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266012478] [2021-01-06 17:01:47,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 17:01:47,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:47,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 17:01:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:01:47,433 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 58 states. [2021-01-06 17:01:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:47,673 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-01-06 17:01:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 17:01:47,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2021-01-06 17:01:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:47,675 INFO L225 Difference]: With dead ends: 170 [2021-01-06 17:01:47,675 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 17:01:47,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:01:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 17:01:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-01-06 17:01:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 17:01:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-01-06 17:01:47,687 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2021-01-06 17:01:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-01-06 17:01:47,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 17:01:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-01-06 17:01:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-01-06 17:01:47,689 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:47,689 INFO L422 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:47,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 17:01:47,905 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2021-01-06 17:01:47,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:47,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062615980] [2021-01-06 17:01:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 17:01:50,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062615980] [2021-01-06 17:01:50,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078585967] [2021-01-06 17:01:50,048 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:50,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 17:01:50,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:01:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-01-06 17:01:51,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:51,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 18] total 74 [2021-01-06 17:01:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061729712] [2021-01-06 17:01:51,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 17:01:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:51,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 17:01:51,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:01:51,224 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 74 states. [2021-01-06 17:01:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:54,675 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-01-06 17:01:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 17:01:54,676 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 140 [2021-01-06 17:01:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:54,677 INFO L225 Difference]: With dead ends: 193 [2021-01-06 17:01:54,677 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 17:01:54,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5725, Invalid=11045, Unknown=0, NotChecked=0, Total=16770 [2021-01-06 17:01:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 17:01:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-01-06 17:01:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 17:01:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2021-01-06 17:01:54,692 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2021-01-06 17:01:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:54,692 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2021-01-06 17:01:54,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 17:01:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2021-01-06 17:01:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 17:01:54,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:54,693 INFO L422 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:54,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:54,894 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2021-01-06 17:01:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:54,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301159202] [2021-01-06 17:01:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:01:57,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301159202] [2021-01-06 17:01:57,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465637022] [2021-01-06 17:01:57,325 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 17:01:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:01:57,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:57,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 17:01:57,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246006659] [2021-01-06 17:01:57,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 17:01:57,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 17:01:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:01:57,611 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 60 states. [2021-01-06 17:01:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:58,012 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-01-06 17:01:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:01:58,012 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2021-01-06 17:01:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:58,014 INFO L225 Difference]: With dead ends: 176 [2021-01-06 17:01:58,014 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 17:01:58,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:01:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 17:01:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-01-06 17:01:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 17:01:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-01-06 17:01:58,023 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2021-01-06 17:01:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:58,023 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-01-06 17:01:58,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 17:01:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-01-06 17:01:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 17:01:58,024 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:58,024 INFO L422 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:58,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 17:01:58,229 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2021-01-06 17:01:58,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:58,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118920163] [2021-01-06 17:01:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:02:00,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118920163] [2021-01-06 17:02:00,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313026703] [2021-01-06 17:02:00,758 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:00,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:00,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 17:02:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:02:01,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:01,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 17:02:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684866338] [2021-01-06 17:02:01,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 17:02:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 17:02:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:02:01,074 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 61 states. [2021-01-06 17:02:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:01,479 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-01-06 17:02:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 17:02:01,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 145 [2021-01-06 17:02:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:01,480 INFO L225 Difference]: With dead ends: 178 [2021-01-06 17:02:01,480 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 17:02:01,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 17:02:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 17:02:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-01-06 17:02:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 17:02:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2021-01-06 17:02:01,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 145 [2021-01-06 17:02:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:01,489 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2021-01-06 17:02:01,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 17:02:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2021-01-06 17:02:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 17:02:01,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:01,490 INFO L422 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:01,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:01,692 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2021-01-06 17:02:01,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:01,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823782076] [2021-01-06 17:02:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:02:04,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823782076] [2021-01-06 17:02:04,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419540185] [2021-01-06 17:02:04,235 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:04,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:02:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:02:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-01-06 17:02:05,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:05,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 19] total 78 [2021-01-06 17:02:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99847051] [2021-01-06 17:02:05,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 17:02:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 17:02:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=4006, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:02:05,540 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 78 states. [2021-01-06 17:02:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:09,587 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2021-01-06 17:02:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 17:02:09,588 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 147 [2021-01-06 17:02:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:09,590 INFO L225 Difference]: With dead ends: 201 [2021-01-06 17:02:09,590 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 17:02:09,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6366, Invalid=12266, Unknown=0, NotChecked=0, Total=18632 [2021-01-06 17:02:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 17:02:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2021-01-06 17:02:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 17:02:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-01-06 17:02:09,602 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 147 [2021-01-06 17:02:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-01-06 17:02:09,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 17:02:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-01-06 17:02:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 17:02:09,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:09,603 INFO L422 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:09,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 17:02:09,818 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2021-01-06 17:02:09,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:09,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291339664] [2021-01-06 17:02:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 17:02:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291339664] [2021-01-06 17:02:12,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261667615] [2021-01-06 17:02:12,419 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:12,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:02:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 17:02:12,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:12,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 17:02:12,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857277324] [2021-01-06 17:02:12,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 17:02:12,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:12,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 17:02:12,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:02:12,701 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 63 states. [2021-01-06 17:02:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:13,003 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-01-06 17:02:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:02:13,004 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 150 [2021-01-06 17:02:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:13,005 INFO L225 Difference]: With dead ends: 184 [2021-01-06 17:02:13,005 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 17:02:13,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:02:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 17:02:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-01-06 17:02:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 17:02:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-01-06 17:02:13,015 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2021-01-06 17:02:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:13,015 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-01-06 17:02:13,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 17:02:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-01-06 17:02:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 17:02:13,016 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:13,016 INFO L422 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:13,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:13,217 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2021-01-06 17:02:13,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:13,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234190467] [2021-01-06 17:02:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 17:02:15,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234190467] [2021-01-06 17:02:15,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787131816] [2021-01-06 17:02:15,981 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:16,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-01-06 17:02:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 17:02:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 17:02:16,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:16,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 17:02:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317800130] [2021-01-06 17:02:16,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 17:02:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 17:02:16,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:02:16,325 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 64 states. [2021-01-06 17:02:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:16,757 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2021-01-06 17:02:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 17:02:16,758 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 152 [2021-01-06 17:02:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:16,760 INFO L225 Difference]: With dead ends: 186 [2021-01-06 17:02:16,760 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 17:02:16,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 17:02:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 17:02:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-01-06 17:02:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 17:02:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2021-01-06 17:02:16,774 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 152 [2021-01-06 17:02:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:16,774 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2021-01-06 17:02:16,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 17:02:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2021-01-06 17:02:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 17:02:16,775 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:16,775 INFO L422 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:16,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 17:02:16,984 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2021-01-06 17:02:16,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:16,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649339200] [2021-01-06 17:02:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 17:02:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649339200] [2021-01-06 17:02:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960019325] [2021-01-06 17:02:19,764 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:19,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 17:02:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:02:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2021-01-06 17:02:20,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:20,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2021-01-06 17:02:20,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813032335] [2021-01-06 17:02:20,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 17:02:20,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:20,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 17:02:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:02:20,497 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 69 states. [2021-01-06 17:02:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:21,035 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-01-06 17:02:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 17:02:21,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 154 [2021-01-06 17:02:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:21,038 INFO L225 Difference]: With dead ends: 191 [2021-01-06 17:02:21,038 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 17:02:21,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:02:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 17:02:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-01-06 17:02:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 17:02:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2021-01-06 17:02:21,049 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 154 [2021-01-06 17:02:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:21,049 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2021-01-06 17:02:21,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 17:02:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2021-01-06 17:02:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 17:02:21,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:21,050 INFO L422 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:21,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:21,251 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2021-01-06 17:02:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:21,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638721988] [2021-01-06 17:02:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:02:24,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638721988] [2021-01-06 17:02:24,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167708394] [2021-01-06 17:02:24,158 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:02:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:02:24,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:24,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 17:02:24,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27043622] [2021-01-06 17:02:24,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 17:02:24,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 17:02:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:02:24,469 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand 66 states. [2021-01-06 17:02:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:24,912 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-01-06 17:02:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 17:02:24,913 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2021-01-06 17:02:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:24,914 INFO L225 Difference]: With dead ends: 194 [2021-01-06 17:02:24,914 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 17:02:24,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:02:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 17:02:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-01-06 17:02:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 17:02:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2021-01-06 17:02:24,930 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 158 [2021-01-06 17:02:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:24,930 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2021-01-06 17:02:24,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 17:02:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2021-01-06 17:02:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 17:02:24,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:24,931 INFO L422 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:25,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 17:02:25,147 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2021-01-06 17:02:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:25,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950975846] [2021-01-06 17:02:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:02:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950975846] [2021-01-06 17:02:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343947376] [2021-01-06 17:02:28,142 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:28,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:02:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 17:02:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:02:28,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:28,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 17:02:28,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889677490] [2021-01-06 17:02:28,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 17:02:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 17:02:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 17:02:28,435 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand 67 states. [2021-01-06 17:02:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:28,889 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2021-01-06 17:02:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 17:02:28,890 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 160 [2021-01-06 17:02:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:28,894 INFO L225 Difference]: With dead ends: 196 [2021-01-06 17:02:28,894 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 17:02:28,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 17:02:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 17:02:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-01-06 17:02:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 17:02:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2021-01-06 17:02:28,909 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 160 [2021-01-06 17:02:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:28,909 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2021-01-06 17:02:28,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 17:02:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2021-01-06 17:02:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 17:02:28,910 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:28,911 INFO L422 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:29,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:29,125 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2021-01-06 17:02:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:29,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718398423] [2021-01-06 17:02:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:02:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718398423] [2021-01-06 17:02:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443864000] [2021-01-06 17:02:32,168 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:32,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 17:02:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:02:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-01-06 17:02:33,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:33,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 20] total 85 [2021-01-06 17:02:33,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222932548] [2021-01-06 17:02:33,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 17:02:33,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 17:02:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=4740, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 17:02:33,502 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand 85 states. [2021-01-06 17:02:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:38,641 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-01-06 17:02:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 17:02:38,642 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 162 [2021-01-06 17:02:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:38,643 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:02:38,643 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 17:02:38,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7600, Invalid=14750, Unknown=0, NotChecked=0, Total=22350 [2021-01-06 17:02:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 17:02:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 166. [2021-01-06 17:02:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 17:02:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2021-01-06 17:02:38,658 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 162 [2021-01-06 17:02:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:38,659 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2021-01-06 17:02:38,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 17:02:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2021-01-06 17:02:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 17:02:38,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:38,660 INFO L422 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:38,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 17:02:38,870 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2021-01-06 17:02:38,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:38,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725276570] [2021-01-06 17:02:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 17:02:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725276570] [2021-01-06 17:02:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309140252] [2021-01-06 17:02:42,057 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:42,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:02:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 17:02:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 17:02:42,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:42,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 17:02:42,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740134357] [2021-01-06 17:02:42,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 17:02:42,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 17:02:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:02:42,408 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 69 states. [2021-01-06 17:02:42,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:42,870 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2021-01-06 17:02:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 17:02:42,871 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 165 [2021-01-06 17:02:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:42,872 INFO L225 Difference]: With dead ends: 202 [2021-01-06 17:02:42,872 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 17:02:42,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:02:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 17:02:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-01-06 17:02:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 17:02:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2021-01-06 17:02:42,889 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 165 [2021-01-06 17:02:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:42,889 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2021-01-06 17:02:42,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 17:02:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2021-01-06 17:02:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-01-06 17:02:42,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:42,890 INFO L422 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:43,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 17:02:43,105 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2021-01-06 17:02:43,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:43,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110610606] [2021-01-06 17:02:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 17:02:46,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110610606] [2021-01-06 17:02:46,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300492649] [2021-01-06 17:02:46,307 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:46,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 17:02:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 17:02:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 17:02:46,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:46,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 17:02:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303417509] [2021-01-06 17:02:46,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 17:02:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 17:02:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:02:46,680 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 70 states. [2021-01-06 17:02:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:47,014 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-01-06 17:02:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 17:02:47,015 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 167 [2021-01-06 17:02:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:47,018 INFO L225 Difference]: With dead ends: 204 [2021-01-06 17:02:47,018 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 17:02:47,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:02:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 17:02:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-01-06 17:02:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 17:02:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2021-01-06 17:02:47,034 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 167 [2021-01-06 17:02:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:47,034 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2021-01-06 17:02:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 17:02:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2021-01-06 17:02:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 17:02:47,035 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:47,035 INFO L422 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:47,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 17:02:47,236 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2021-01-06 17:02:47,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:47,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175465455] [2021-01-06 17:02:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 17:02:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175465455] [2021-01-06 17:02:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567487091] [2021-01-06 17:02:50,543 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:50,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 17:02:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:02:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-01-06 17:02:52,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:52,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 21] total 89 [2021-01-06 17:02:52,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959893945] [2021-01-06 17:02:52,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-01-06 17:02:52,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:52,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-01-06 17:02:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2624, Invalid=5208, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 17:02:52,171 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 89 states. [2021-01-06 17:02:57,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:57,660 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2021-01-06 17:02:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-01-06 17:02:57,661 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 169 [2021-01-06 17:02:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:57,662 INFO L225 Difference]: With dead ends: 237 [2021-01-06 17:02:57,662 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 17:02:57,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3953 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=8336, Invalid=16156, Unknown=0, NotChecked=0, Total=24492 [2021-01-06 17:02:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 17:02:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-01-06 17:02:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 17:02:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2021-01-06 17:02:57,679 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 169 [2021-01-06 17:02:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:57,679 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2021-01-06 17:02:57,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2021-01-06 17:02:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2021-01-06 17:02:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 17:02:57,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:57,681 INFO L422 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:57,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:57,894 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2021-01-06 17:02:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979018426] [2021-01-06 17:02:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-01-06 17:03:01,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979018426] [2021-01-06 17:03:01,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327074350] [2021-01-06 17:03:01,400 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 17:03:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-01-06 17:03:01,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:01,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 17:03:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189031936] [2021-01-06 17:03:01,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 17:03:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 17:03:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:03:01,736 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand 72 states. [2021-01-06 17:03:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:02,228 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-01-06 17:03:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 17:03:02,229 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 172 [2021-01-06 17:03:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:02,231 INFO L225 Difference]: With dead ends: 210 [2021-01-06 17:03:02,231 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 17:03:02,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:03:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 17:03:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-01-06 17:03:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 17:03:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2021-01-06 17:03:02,244 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2021-01-06 17:03:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:02,244 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2021-01-06 17:03:02,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 17:03:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2021-01-06 17:03:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 17:03:02,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:02,245 INFO L422 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:02,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:02,459 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2021-01-06 17:03:02,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:02,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332596182] [2021-01-06 17:03:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-01-06 17:03:06,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332596182] [2021-01-06 17:03:06,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627994985] [2021-01-06 17:03:06,144 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:06,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:06,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 17:03:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-01-06 17:03:06,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:06,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 17:03:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715570305] [2021-01-06 17:03:06,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 17:03:06,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 17:03:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 17:03:06,519 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand 73 states. [2021-01-06 17:03:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:07,039 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2021-01-06 17:03:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 17:03:07,046 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 174 [2021-01-06 17:03:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:07,047 INFO L225 Difference]: With dead ends: 212 [2021-01-06 17:03:07,047 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:03:07,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 17:03:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:03:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-01-06 17:03:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 17:03:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2021-01-06 17:03:07,063 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 174 [2021-01-06 17:03:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:07,063 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2021-01-06 17:03:07,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 17:03:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2021-01-06 17:03:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 17:03:07,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:07,065 INFO L422 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:07,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:07,279 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2021-01-06 17:03:07,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:07,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104064294] [2021-01-06 17:03:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-01-06 17:03:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104064294] [2021-01-06 17:03:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120435936] [2021-01-06 17:03:11,005 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:11,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 17:03:11,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:11,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:03:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-01-06 17:03:12,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:12,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 22] total 93 [2021-01-06 17:03:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014951460] [2021-01-06 17:03:12,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-01-06 17:03:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-01-06 17:03:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=5698, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 17:03:12,732 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand 93 states. [2021-01-06 17:03:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:18,865 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-01-06 17:03:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 17:03:18,866 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 176 [2021-01-06 17:03:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:18,867 INFO L225 Difference]: With dead ends: 245 [2021-01-06 17:03:18,867 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 17:03:18,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=9106, Invalid=17626, Unknown=0, NotChecked=0, Total=26732 [2021-01-06 17:03:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 17:03:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 180. [2021-01-06 17:03:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 17:03:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2021-01-06 17:03:18,888 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 176 [2021-01-06 17:03:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:18,889 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2021-01-06 17:03:18,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2021-01-06 17:03:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2021-01-06 17:03:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-01-06 17:03:18,890 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:18,890 INFO L422 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:19,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-06 17:03:19,105 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2021-01-06 17:03:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:19,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203894638] [2021-01-06 17:03:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 17:03:23,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203894638] [2021-01-06 17:03:23,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654774618] [2021-01-06 17:03:23,046 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:23,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 17:03:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 17:03:23,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:23,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 17:03:23,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899352650] [2021-01-06 17:03:23,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 17:03:23,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 17:03:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 17:03:23,404 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 75 states. [2021-01-06 17:03:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:23,824 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-01-06 17:03:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 17:03:23,825 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 179 [2021-01-06 17:03:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:23,827 INFO L225 Difference]: With dead ends: 218 [2021-01-06 17:03:23,827 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 17:03:23,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 17:03:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 17:03:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-01-06 17:03:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 17:03:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-01-06 17:03:23,845 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2021-01-06 17:03:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-01-06 17:03:23,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 17:03:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-01-06 17:03:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 17:03:23,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:23,847 INFO L422 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:24,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:24,061 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2021-01-06 17:03:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:24,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568321323] [2021-01-06 17:03:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 17:03:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568321323] [2021-01-06 17:03:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699009297] [2021-01-06 17:03:28,047 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:28,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 17:03:28,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 17:03:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 17:03:28,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:28,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 17:03:28,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709920083] [2021-01-06 17:03:28,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 17:03:28,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 17:03:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:03:28,469 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand 76 states. [2021-01-06 17:03:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:28,964 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-01-06 17:03:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 17:03:28,965 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 181 [2021-01-06 17:03:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:28,967 INFO L225 Difference]: With dead ends: 220 [2021-01-06 17:03:28,967 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 17:03:28,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:03:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 17:03:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-01-06 17:03:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 17:03:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2021-01-06 17:03:28,980 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 181 [2021-01-06 17:03:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:28,980 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2021-01-06 17:03:28,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 17:03:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2021-01-06 17:03:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 17:03:28,980 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:28,981 INFO L422 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:29,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:29,182 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2021-01-06 17:03:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:29,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421842829] [2021-01-06 17:03:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 17:03:33,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421842829] [2021-01-06 17:03:33,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977464653] [2021-01-06 17:03:33,250 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:33,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-01-06 17:03:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:03:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-01-06 17:03:35,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:35,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 23] total 97 [2021-01-06 17:03:35,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069320860] [2021-01-06 17:03:35,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 17:03:35,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 17:03:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3102, Invalid=6210, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 17:03:35,243 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 97 states. [2021-01-06 17:03:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:42,044 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-01-06 17:03:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-01-06 17:03:42,045 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 183 [2021-01-06 17:03:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:42,046 INFO L225 Difference]: With dead ends: 253 [2021-01-06 17:03:42,046 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 17:03:42,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4680 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=9910, Invalid=19160, Unknown=0, NotChecked=0, Total=29070 [2021-01-06 17:03:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 17:03:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-01-06 17:03:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 17:03:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2021-01-06 17:03:42,066 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 183 [2021-01-06 17:03:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:42,066 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2021-01-06 17:03:42,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 17:03:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2021-01-06 17:03:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 17:03:42,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:42,068 INFO L422 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:42,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:42,287 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:42,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2021-01-06 17:03:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:42,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240562653] [2021-01-06 17:03:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 17:03:46,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240562653] [2021-01-06 17:03:46,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266951589] [2021-01-06 17:03:46,582 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 17:03:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 17:03:46,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:46,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 17:03:46,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298562882] [2021-01-06 17:03:46,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 17:03:46,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 17:03:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:03:46,942 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand 78 states. [2021-01-06 17:03:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:47,554 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-01-06 17:03:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 17:03:47,555 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 186 [2021-01-06 17:03:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:47,556 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:03:47,556 INFO L226 Difference]: Without dead ends: 189 [2021-01-06 17:03:47,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:03:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-01-06 17:03:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-01-06 17:03:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 17:03:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2021-01-06 17:03:47,576 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2021-01-06 17:03:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:47,577 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2021-01-06 17:03:47,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 17:03:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2021-01-06 17:03:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 17:03:47,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:47,578 INFO L422 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:47,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 17:03:47,788 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2021-01-06 17:03:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:47,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118909685] [2021-01-06 17:03:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 17:03:52,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118909685] [2021-01-06 17:03:52,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982342474] [2021-01-06 17:03:52,225 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:52,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 17:03:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 17:03:52,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:52,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 17:03:52,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851361878] [2021-01-06 17:03:52,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 17:03:52,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 17:03:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 17:03:52,593 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand 79 states. [2021-01-06 17:03:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:53,043 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2021-01-06 17:03:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 17:03:53,044 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 188 [2021-01-06 17:03:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:53,045 INFO L225 Difference]: With dead ends: 228 [2021-01-06 17:03:53,045 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 17:03:53,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 17:03:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 17:03:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-01-06 17:03:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:03:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2021-01-06 17:03:53,064 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 188 [2021-01-06 17:03:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:53,065 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2021-01-06 17:03:53,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 17:03:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2021-01-06 17:03:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 17:03:53,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:53,066 INFO L422 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:53,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:53,282 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:53,282 INFO L82 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2021-01-06 17:03:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:53,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086180552] [2021-01-06 17:03:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 17:03:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086180552] [2021-01-06 17:03:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078860864] [2021-01-06 17:03:57,873 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 17:03:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:03:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2021-01-06 17:03:58,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:58,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2021-01-06 17:03:58,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079337693] [2021-01-06 17:03:58,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 17:03:58,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 17:03:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 17:03:58,921 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand 85 states. [2021-01-06 17:03:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:59,575 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-01-06 17:03:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 17:03:59,576 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 190 [2021-01-06 17:03:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:59,577 INFO L225 Difference]: With dead ends: 233 [2021-01-06 17:03:59,577 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 17:03:59,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 17:03:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 17:03:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-01-06 17:03:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 17:03:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2021-01-06 17:03:59,591 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 190 [2021-01-06 17:03:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:59,592 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2021-01-06 17:03:59,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 17:03:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2021-01-06 17:03:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 17:03:59,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:59,593 INFO L422 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:59,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 17:03:59,793 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2021-01-06 17:03:59,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:59,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743880082] [2021-01-06 17:03:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:04:04,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743880082] [2021-01-06 17:04:04,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80358901] [2021-01-06 17:04:04,572 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 17:04:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:04:04,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:04,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 17:04:04,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295572751] [2021-01-06 17:04:04,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 17:04:04,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 17:04:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 17:04:04,956 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand 81 states. [2021-01-06 17:04:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:05,622 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2021-01-06 17:04:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 17:04:05,623 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 194 [2021-01-06 17:04:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:05,624 INFO L225 Difference]: With dead ends: 236 [2021-01-06 17:04:05,624 INFO L226 Difference]: Without dead ends: 197 [2021-01-06 17:04:05,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 17:04:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-01-06 17:04:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-01-06 17:04:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 17:04:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2021-01-06 17:04:05,640 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 194 [2021-01-06 17:04:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:05,640 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2021-01-06 17:04:05,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 17:04:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2021-01-06 17:04:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 17:04:05,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:05,641 INFO L422 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:05,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:05,841 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2021-01-06 17:04:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:05,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855508541] [2021-01-06 17:04:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:04:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855508541] [2021-01-06 17:04:10,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207316324] [2021-01-06 17:04:10,739 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:10,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-01-06 17:04:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 17:04:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:04:11,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:11,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 17:04:11,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353366658] [2021-01-06 17:04:11,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 17:04:11,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 17:04:11,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 17:04:11,205 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand 82 states. [2021-01-06 17:04:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:11,871 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-01-06 17:04:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 17:04:11,872 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 196 [2021-01-06 17:04:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:11,873 INFO L225 Difference]: With dead ends: 238 [2021-01-06 17:04:11,873 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 17:04:11,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 17:04:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 17:04:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-01-06 17:04:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 17:04:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2021-01-06 17:04:11,887 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 196 [2021-01-06 17:04:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:11,887 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2021-01-06 17:04:11,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 17:04:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2021-01-06 17:04:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-01-06 17:04:11,888 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:11,889 INFO L422 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:12,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:12,104 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2021-01-06 17:04:12,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:12,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811704859] [2021-01-06 17:04:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat