/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/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:48:14,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:48:14,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:48:14,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:48:14,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:48:14,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:48:14,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:48:14,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:48:14,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:48:14,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:48:14,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:48:14,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:48:14,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:48:14,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:48:14,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:48:14,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:48:14,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:48:14,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:48:14,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:48:14,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:48:14,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:48:14,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:48:14,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:48:14,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:48:14,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:48:14,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:48:14,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:48:14,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:48:14,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:48:14,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:48:14,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:48:14,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:48:14,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:48:14,915 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:48:14,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:48:14,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:48:14,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:48:14,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:48:14,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:48:14,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:48:14,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:48:14,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:48:14,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:48:14,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:48:14,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:48:14,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:48:14,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:48:14,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:48:14,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:48:14,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:48:14,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:48:14,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:48:14,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:48:14,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:48:14,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:48:15,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:48:15,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:48:15,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:48:15,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:48:15,350 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:48:15,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2020-12-22 04:48:15,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649c88fbe/193d99b7f3b34c84a659c8326d0f1cf5/FLAG683fa26ef [2020-12-22 04:48:15,991 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:48:15,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2020-12-22 04:48:16,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649c88fbe/193d99b7f3b34c84a659c8326d0f1cf5/FLAG683fa26ef [2020-12-22 04:48:16,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649c88fbe/193d99b7f3b34c84a659c8326d0f1cf5 [2020-12-22 04:48:16,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:48:16,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:48:16,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:48:16,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:48:16,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:48:16,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a603e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16, skipping insertion in model container [2020-12-22 04:48:16,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:48:16,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:48:16,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2020-12-22 04:48:16,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:48:16,583 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:48:16,595 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2020-12-22 04:48:16,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:48:16,622 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:48:16,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16 WrapperNode [2020-12-22 04:48:16,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:48:16,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:48:16,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:48:16,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:48:16,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:48:16,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:48:16,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:48:16,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:48:16,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... [2020-12-22 04:48:16,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:48:16,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:48:16,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:48:16,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:48:16,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:48:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:48:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:48:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:48:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:48:17,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:48:17,185 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-22 04:48:17,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:17 BoogieIcfgContainer [2020-12-22 04:48:17,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:48:17,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:48:17,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:48:17,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:48:17,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:48:16" (1/3) ... [2020-12-22 04:48:17,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628c8420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:17, skipping insertion in model container [2020-12-22 04:48:17,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:16" (2/3) ... [2020-12-22 04:48:17,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628c8420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:17, skipping insertion in model container [2020-12-22 04:48:17,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:17" (3/3) ... [2020-12-22 04:48:17,236 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2020-12-22 04:48:17,249 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:48:17,262 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:48:17,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:48:17,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:48:17,320 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:48:17,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:48:17,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:48:17,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:48:17,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:48:17,321 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:48:17,321 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:48:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 04:48:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:48:17,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:17,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:48:17,366 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:17,379 INFO L82 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2020-12-22 04:48:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:17,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671752651] [2020-12-22 04:48:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671752651] [2020-12-22 04:48:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:48:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405066025] [2020-12-22 04:48:17,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:48:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:48:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:17,665 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2020-12-22 04:48:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:17,715 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2020-12-22 04:48:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:48:17,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 04:48:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:17,727 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:48:17,727 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:48:17,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:48:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:48:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:48:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:48:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-22 04:48:17,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2020-12-22 04:48:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:17,772 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-22 04:48:17,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:48:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-22 04:48:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:48:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:17,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:17,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:48:17,774 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2020-12-22 04:48:17,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:17,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824784414] [2020-12-22 04:48:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:17,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824784414] [2020-12-22 04:48:17,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:17,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 04:48:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949777024] [2020-12-22 04:48:17,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:48:17,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:48:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:48:17,991 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 9 states. [2020-12-22 04:48:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,207 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-22 04:48:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:48:18,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-22 04:48:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,209 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:48:18,209 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:48:18,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:48:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:48:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-22 04:48:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:48:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-12-22 04:48:18,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2020-12-22 04:48:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,219 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-12-22 04:48:18,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:48:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-12-22 04:48:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:48:18,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:48:18,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2020-12-22 04:48:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564280158] [2020-12-22 04:48:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:18,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564280158] [2020-12-22 04:48:18,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:18,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:48:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900176552] [2020-12-22 04:48:18,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:48:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:48:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:18,294 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 4 states. [2020-12-22 04:48:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,310 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-22 04:48:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:18,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-22 04:48:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,312 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:48:18,312 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:48:18,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:48:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-22 04:48:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:48:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-12-22 04:48:18,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2020-12-22 04:48:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,321 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-12-22 04:48:18,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:48:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-12-22 04:48:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:48:18,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:48:18,323 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2020-12-22 04:48:18,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444933729] [2020-12-22 04:48:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:18,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444933729] [2020-12-22 04:48:18,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:18,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:48:18,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996873764] [2020-12-22 04:48:18,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:48:18,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:48:18,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:18,379 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 4 states. [2020-12-22 04:48:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,397 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-22 04:48:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:18,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-22 04:48:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,399 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:48:18,399 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:48:18,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:48:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-12-22 04:48:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:48:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-12-22 04:48:18,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2020-12-22 04:48:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,409 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-12-22 04:48:18,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:48:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-12-22 04:48:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:48:18,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:48:18,411 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2020-12-22 04:48:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087819289] [2020-12-22 04:48:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:18,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087819289] [2020-12-22 04:48:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:18,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:48:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986625369] [2020-12-22 04:48:18,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:48:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:48:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:18,475 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 3 states. [2020-12-22 04:48:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,489 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-12-22 04:48:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:48:18,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 04:48:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,491 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:48:18,491 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:48:18,492 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 [2020-12-22 04:48:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:48:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:48:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:48:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-12-22 04:48:18,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 20 [2020-12-22 04:48:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,500 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-12-22 04:48:18,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:48:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-12-22 04:48:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:48:18,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:48:18,502 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2020-12-22 04:48:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960684753] [2020-12-22 04:48:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:18,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960684753] [2020-12-22 04:48:18,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:18,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:48:18,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201307627] [2020-12-22 04:48:18,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:48:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:48:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:48:18,577 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 3 states. [2020-12-22 04:48:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,608 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-12-22 04:48:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:48:18,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 04:48:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,610 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:48:18,610 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:48:18,611 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 [2020-12-22 04:48:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:48:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:48:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:48:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-22 04:48:18,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2020-12-22 04:48:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,617 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-22 04:48:18,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:48:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-22 04:48:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:48:18,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 04:48:18,619 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2020-12-22 04:48:18,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546456156] [2020-12-22 04:48:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:48:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546456156] [2020-12-22 04:48:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:48:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:48:18,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956673428] [2020-12-22 04:48:18,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:48:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:48:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:48:18,732 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 4 states. [2020-12-22 04:48:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:18,774 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-22 04:48:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:18,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-22 04:48:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:18,779 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:48:18,779 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:48:18,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:48:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:48:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:48:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:48:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-22 04:48:18,792 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2020-12-22 04:48:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:18,792 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-22 04:48:18,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:48:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-22 04:48:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:48:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:18,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:18,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 04:48:18,794 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2020-12-22 04:48:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:18,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145071842] [2020-12-22 04:48:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:48:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145071842] [2020-12-22 04:48:18,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402160123] [2020-12-22 04:48:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:48:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:48:19,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:19,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 04:48:19,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972864939] [2020-12-22 04:48:19,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:48:19,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:48:19,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:19,073 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-22 04:48:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:19,093 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-22 04:48:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:48:19,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-22 04:48:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:19,094 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:48:19,095 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:48:19,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:48:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:48:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:48:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-22 04:48:19,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2020-12-22 04:48:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:19,100 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-22 04:48:19,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:48:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-22 04:48:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:48:19,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:19,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:19,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 04:48:19,315 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2020-12-22 04:48:19,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:19,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143286718] [2020-12-22 04:48:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:48:19,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143286718] [2020-12-22 04:48:19,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357209977] [2020-12-22 04:48:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:48:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:19,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:19,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-22 04:48:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231619266] [2020-12-22 04:48:19,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:48:19,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:48:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:19,503 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2020-12-22 04:48:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:19,531 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-12-22 04:48:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:48:19,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-22 04:48:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:19,532 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:48:19,532 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:48:19,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:48:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:48:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:48:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:48:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 04:48:19,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2020-12-22 04:48:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:19,537 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 04:48:19,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:48:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 04:48:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:48:19,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:19,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:19,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:19,752 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2020-12-22 04:48:19,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:19,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110892423] [2020-12-22 04:48:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:19,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110892423] [2020-12-22 04:48:19,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062182243] [2020-12-22 04:48:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:48:19,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:19,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:19,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 04:48:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815707168] [2020-12-22 04:48:19,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:48:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:48:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:19,925 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-22 04:48:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:19,938 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-12-22 04:48:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:48:19,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 04:48:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:19,939 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:48:19,939 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:48:19,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:48:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:48:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:48:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:48:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-22 04:48:19,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2020-12-22 04:48:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:19,944 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-22 04:48:19,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:48:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-22 04:48:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:48:19,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:19,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:20,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:48:20,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2020-12-22 04:48:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:20,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324967220] [2020-12-22 04:48:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:20,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324967220] [2020-12-22 04:48:20,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520614760] [2020-12-22 04:48:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:48:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:20,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:20,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:20,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-12-22 04:48:20,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721114648] [2020-12-22 04:48:20,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:48:20,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:48:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:48:20,727 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 20 states. [2020-12-22 04:48:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:21,257 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-12-22 04:48:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:48:21,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-22 04:48:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:21,259 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:48:21,259 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:48:21,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:48:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:48:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2020-12-22 04:48:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:48:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-22 04:48:21,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2020-12-22 04:48:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:21,270 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-22 04:48:21,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:48:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-22 04:48:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:21,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:21,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:21,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:21,485 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2020-12-22 04:48:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:21,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168850400] [2020-12-22 04:48:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:21,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168850400] [2020-12-22 04:48:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573313717] [2020-12-22 04:48:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:21,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:21,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:21,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:48:21,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125338793] [2020-12-22 04:48:21,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:48:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:21,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:48:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:21,740 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 10 states. [2020-12-22 04:48:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:21,843 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-12-22 04:48:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:21,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-22 04:48:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:21,849 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:48:21,849 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:48:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:48:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:48:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-12-22 04:48:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:48:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-12-22 04:48:21,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2020-12-22 04:48:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:21,871 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-12-22 04:48:21,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:48:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-12-22 04:48:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:21,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:21,872 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:22,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:48:22,073 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2020-12-22 04:48:22,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:22,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998734512] [2020-12-22 04:48:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:22,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998734512] [2020-12-22 04:48:22,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288308860] [2020-12-22 04:48:22,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:22,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:48:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:22,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:48:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:22,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:22,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-22 04:48:22,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831450901] [2020-12-22 04:48:22,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:48:22,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:48:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:48:22,278 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 9 states. [2020-12-22 04:48:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:22,308 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-22 04:48:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:48:22,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-22 04:48:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:22,309 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:48:22,310 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:48:22,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:48:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:48:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-12-22 04:48:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:48:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-12-22 04:48:22,319 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2020-12-22 04:48:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:22,320 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-12-22 04:48:22,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:48:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-12-22 04:48:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:22,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:22,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:22,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:22,535 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2020-12-22 04:48:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:22,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051273986] [2020-12-22 04:48:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051273986] [2020-12-22 04:48:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583628370] [2020-12-22 04:48:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:22,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:22,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:48:22,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:22,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:22,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-22 04:48:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849261946] [2020-12-22 04:48:22,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:48:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:48:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:48:22,758 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 9 states. [2020-12-22 04:48:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:22,795 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2020-12-22 04:48:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:48:22,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-22 04:48:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:22,796 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:48:22,796 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:48:22,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:48:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:48:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-12-22 04:48:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:48:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-12-22 04:48:22,809 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2020-12-22 04:48:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:22,809 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-12-22 04:48:22,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:48:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-12-22 04:48:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:48:22,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:22,810 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:23,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:48:23,026 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:23,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2020-12-22 04:48:23,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:23,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138249877] [2020-12-22 04:48:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:23,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138249877] [2020-12-22 04:48:23,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726946725] [2020-12-22 04:48:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:23,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-22 04:48:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125776850] [2020-12-22 04:48:23,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:48:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:48:23,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:48:23,291 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 11 states. [2020-12-22 04:48:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:23,438 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-12-22 04:48:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:23,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-22 04:48:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:23,439 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:48:23,439 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:48:23,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:48:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:48:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-12-22 04:48:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:48:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-22 04:48:23,452 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2020-12-22 04:48:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:23,452 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-22 04:48:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:48:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-22 04:48:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:48:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:23,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:23,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:48:23,667 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:23,668 INFO L82 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2020-12-22 04:48:23,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:23,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264462945] [2020-12-22 04:48:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:48:23,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264462945] [2020-12-22 04:48:23,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227764618] [2020-12-22 04:48:23,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:23,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 04:48:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:23,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:23,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-12-22 04:48:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093423859] [2020-12-22 04:48:23,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:48:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:48:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:48:23,946 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2020-12-22 04:48:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:24,069 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-22 04:48:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:24,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-22 04:48:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:24,070 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:48:24,070 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:48:24,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:48:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:48:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-12-22 04:48:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:48:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-12-22 04:48:24,093 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2020-12-22 04:48:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:24,093 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-12-22 04:48:24,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:48:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-12-22 04:48:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:48:24,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:24,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:24,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:48:24,309 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2020-12-22 04:48:24,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:24,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803385742] [2020-12-22 04:48:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803385742] [2020-12-22 04:48:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255698071] [2020-12-22 04:48:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:24,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:48:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:24,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:24,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:24,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2020-12-22 04:48:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367239301] [2020-12-22 04:48:24,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:48:24,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:48:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:48:24,850 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 23 states. [2020-12-22 04:48:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:25,437 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-12-22 04:48:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:48:25,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 04:48:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:25,439 INFO L225 Difference]: With dead ends: 159 [2020-12-22 04:48:25,439 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 04:48:25,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:48:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 04:48:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-12-22 04:48:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:48:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-12-22 04:48:25,461 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2020-12-22 04:48:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:25,461 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-12-22 04:48:25,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:48:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-12-22 04:48:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:48:25,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:25,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:25,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:48:25,677 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2020-12-22 04:48:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:25,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527444746] [2020-12-22 04:48:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:48:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527444746] [2020-12-22 04:48:25,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691054603] [2020-12-22 04:48:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:25,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:48:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:25,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:25,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2020-12-22 04:48:25,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197531015] [2020-12-22 04:48:25,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:48:25,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:48:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:48:25,944 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 12 states. [2020-12-22 04:48:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:26,091 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-12-22 04:48:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:26,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-12-22 04:48:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:26,093 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:48:26,093 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:48:26,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:48:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:48:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-12-22 04:48:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:48:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-12-22 04:48:26,107 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2020-12-22 04:48:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:26,108 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-12-22 04:48:26,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:48:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-12-22 04:48:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:26,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:26,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:26,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:48:26,323 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:26,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2020-12-22 04:48:26,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:26,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938275282] [2020-12-22 04:48:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938275282] [2020-12-22 04:48:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454070808] [2020-12-22 04:48:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:26,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:48:26,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:26,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:26,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 04:48:26,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235386660] [2020-12-22 04:48:26,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:48:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:48:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:48:26,680 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 15 states. [2020-12-22 04:48:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:26,976 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-22 04:48:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:48:26,977 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-22 04:48:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:26,978 INFO L225 Difference]: With dead ends: 131 [2020-12-22 04:48:26,978 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:48:26,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:48:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:48:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2020-12-22 04:48:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:48:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-22 04:48:26,995 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2020-12-22 04:48:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:26,995 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-22 04:48:26,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:48:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-22 04:48:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:26,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:26,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:27,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:27,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2020-12-22 04:48:27,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:27,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837141474] [2020-12-22 04:48:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:27,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837141474] [2020-12-22 04:48:27,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332746689] [2020-12-22 04:48:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:27,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:27,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:27,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-22 04:48:27,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084606733] [2020-12-22 04:48:27,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:48:27,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:48:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:48:27,581 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 16 states. [2020-12-22 04:48:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:27,877 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-12-22 04:48:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:48:27,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-22 04:48:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:27,878 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:48:27,878 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 04:48:27,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:48:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 04:48:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-12-22 04:48:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:48:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-12-22 04:48:27,894 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2020-12-22 04:48:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:27,895 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-12-22 04:48:27,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:48:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-12-22 04:48:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:27,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:27,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:28,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 04:48:28,110 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:28,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2020-12-22 04:48:28,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:28,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384070082] [2020-12-22 04:48:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384070082] [2020-12-22 04:48:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999616118] [2020-12-22 04:48:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:28,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:28,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:48:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:28,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:28,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:48:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618488697] [2020-12-22 04:48:28,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:48:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:48:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:28,283 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 10 states. [2020-12-22 04:48:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:28,336 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-12-22 04:48:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:28,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-22 04:48:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:28,337 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:48:28,337 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:48:28,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:48:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:48:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-12-22 04:48:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:48:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-12-22 04:48:28,350 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2020-12-22 04:48:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:28,350 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-12-22 04:48:28,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:48:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-12-22 04:48:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:48:28,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:28,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:28,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:28,565 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2020-12-22 04:48:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:28,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660619771] [2020-12-22 04:48:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660619771] [2020-12-22 04:48:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278450236] [2020-12-22 04:48:28,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:28,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 04:48:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:48:28,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:28,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:28,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:48:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384851137] [2020-12-22 04:48:28,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:48:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:48:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:48:28,777 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 10 states. [2020-12-22 04:48:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:28,827 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-12-22 04:48:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:48:28,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-22 04:48:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:28,828 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:48:28,829 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:48:28,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:48:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:48:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-22 04:48:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:48:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-22 04:48:28,844 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2020-12-22 04:48:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:28,844 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-22 04:48:28,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:48:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-22 04:48:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:48:28,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:28,845 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:29,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:48:29,052 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2020-12-22 04:48:29,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:29,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447668288] [2020-12-22 04:48:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:29,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447668288] [2020-12-22 04:48:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026215547] [2020-12-22 04:48:29,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:48:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:29,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:29,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:29,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2020-12-22 04:48:29,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007759354] [2020-12-22 04:48:29,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:48:29,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:48:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:48:29,689 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 26 states. [2020-12-22 04:48:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:30,478 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2020-12-22 04:48:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:48:30,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:48:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:30,479 INFO L225 Difference]: With dead ends: 149 [2020-12-22 04:48:30,479 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 04:48:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:48:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 04:48:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2020-12-22 04:48:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:48:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-12-22 04:48:30,494 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2020-12-22 04:48:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:30,495 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-12-22 04:48:30,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:48:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-12-22 04:48:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:48:30,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:30,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:30,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:30,707 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2020-12-22 04:48:30,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:30,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457832863] [2020-12-22 04:48:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457832863] [2020-12-22 04:48:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838555181] [2020-12-22 04:48:30,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:48:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:31,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-12-22 04:48:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640824215] [2020-12-22 04:48:31,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:48:31,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:48:31,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:48:31,289 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 24 states. [2020-12-22 04:48:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:31,928 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-12-22 04:48:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:48:31,929 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-22 04:48:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:31,929 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:48:31,929 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:48:31,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:48:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:48:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-12-22 04:48:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:48:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-12-22 04:48:31,947 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2020-12-22 04:48:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:31,947 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-12-22 04:48:31,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:48:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-12-22 04:48:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:31,948 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:32,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:48:32,160 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2020-12-22 04:48:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:32,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668303814] [2020-12-22 04:48:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668303814] [2020-12-22 04:48:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528183327] [2020-12-22 04:48:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:48:32,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:48:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-22 04:48:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665976558] [2020-12-22 04:48:32,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:48:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:48:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:48:32,661 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 19 states. [2020-12-22 04:48:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:33,412 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2020-12-22 04:48:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:48:33,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-12-22 04:48:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:33,414 INFO L225 Difference]: With dead ends: 155 [2020-12-22 04:48:33,414 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 04:48:33,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:48:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 04:48:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2020-12-22 04:48:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:48:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-12-22 04:48:33,433 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2020-12-22 04:48:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:33,433 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-12-22 04:48:33,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:48:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-12-22 04:48:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:33,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:33,434 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:33,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:48:33,647 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2020-12-22 04:48:33,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:33,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111656891] [2020-12-22 04:48:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111656891] [2020-12-22 04:48:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793008407] [2020-12-22 04:48:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:33,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:48:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-22 04:48:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175714521] [2020-12-22 04:48:34,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:48:34,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:48:34,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:48:34,143 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 20 states. [2020-12-22 04:48:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:34,601 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-12-22 04:48:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:48:34,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-12-22 04:48:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:34,602 INFO L225 Difference]: With dead ends: 144 [2020-12-22 04:48:34,602 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 04:48:34,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:48:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 04:48:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-12-22 04:48:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:48:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2020-12-22 04:48:34,621 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2020-12-22 04:48:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:34,621 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2020-12-22 04:48:34,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:48:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2020-12-22 04:48:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:34,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:34,622 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:34,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:48:34,835 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2020-12-22 04:48:34,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:34,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749067396] [2020-12-22 04:48:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749067396] [2020-12-22 04:48:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566405387] [2020-12-22 04:48:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:34,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 04:48:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:48:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:35,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:35,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-22 04:48:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200972702] [2020-12-22 04:48:35,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:48:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:48:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:48:35,042 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand 12 states. [2020-12-22 04:48:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:35,163 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-12-22 04:48:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:48:35,164 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-22 04:48:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:35,165 INFO L225 Difference]: With dead ends: 139 [2020-12-22 04:48:35,165 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 04:48:35,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:48:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 04:48:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-12-22 04:48:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:48:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-12-22 04:48:35,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2020-12-22 04:48:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:35,188 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-12-22 04:48:35,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:48:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-12-22 04:48:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:48:35,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:35,189 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:35,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:48:35,402 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2020-12-22 04:48:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:35,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994209370] [2020-12-22 04:48:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:35,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994209370] [2020-12-22 04:48:35,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627591941] [2020-12-22 04:48:35,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:35,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 04:48:35,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:48:35,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 04:48:35,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:35,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-22 04:48:35,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961259631] [2020-12-22 04:48:35,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:48:35,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:48:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:48:35,589 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 12 states. [2020-12-22 04:48:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:35,689 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2020-12-22 04:48:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:48:35,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-22 04:48:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:35,690 INFO L225 Difference]: With dead ends: 262 [2020-12-22 04:48:35,690 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 04:48:35,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:48:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 04:48:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2020-12-22 04:48:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 04:48:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2020-12-22 04:48:35,715 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2020-12-22 04:48:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:35,715 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2020-12-22 04:48:35,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:48:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2020-12-22 04:48:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:48:35,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:35,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:35,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:48:35,932 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2020-12-22 04:48:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:35,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919397702] [2020-12-22 04:48:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919397702] [2020-12-22 04:48:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838011649] [2020-12-22 04:48:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:48:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:36,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:36,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:36,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2020-12-22 04:48:36,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784312253] [2020-12-22 04:48:36,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:48:36,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:48:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:48:36,722 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand 29 states. [2020-12-22 04:48:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:37,718 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2020-12-22 04:48:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:48:37,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2020-12-22 04:48:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:37,720 INFO L225 Difference]: With dead ends: 258 [2020-12-22 04:48:37,720 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 04:48:37,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 04:48:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2020-12-22 04:48:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 04:48:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-12-22 04:48:37,747 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2020-12-22 04:48:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:37,747 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-12-22 04:48:37,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:48:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-12-22 04:48:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:48:37,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:37,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:37,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:37,961 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2020-12-22 04:48:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:37,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145172982] [2020-12-22 04:48:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 04:48:38,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145172982] [2020-12-22 04:48:38,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480435223] [2020-12-22 04:48:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:38,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:38,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:38,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:38,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 04:48:38,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:38,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-22 04:48:38,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221146788] [2020-12-22 04:48:38,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:48:38,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:48:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:48:38,327 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 16 states. [2020-12-22 04:48:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:38,666 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2020-12-22 04:48:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:48:38,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:48:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:38,667 INFO L225 Difference]: With dead ends: 217 [2020-12-22 04:48:38,667 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 04:48:38,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:48:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 04:48:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2020-12-22 04:48:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 04:48:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2020-12-22 04:48:38,699 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2020-12-22 04:48:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:38,700 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2020-12-22 04:48:38,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:48:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2020-12-22 04:48:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:48:38,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:38,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:38,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:38,916 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2020-12-22 04:48:38,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:38,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795011095] [2020-12-22 04:48:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:39,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795011095] [2020-12-22 04:48:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437247346] [2020-12-22 04:48:39,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:48:39,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:48:39,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:39,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:39,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:39,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-12-22 04:48:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975336222] [2020-12-22 04:48:39,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:48:39,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:48:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:48:39,615 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 27 states. [2020-12-22 04:48:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:40,423 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2020-12-22 04:48:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:48:40,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-22 04:48:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:40,425 INFO L225 Difference]: With dead ends: 226 [2020-12-22 04:48:40,426 INFO L226 Difference]: Without dead ends: 204 [2020-12-22 04:48:40,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:48:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-22 04:48:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2020-12-22 04:48:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 04:48:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2020-12-22 04:48:40,460 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2020-12-22 04:48:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:40,460 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2020-12-22 04:48:40,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:48:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2020-12-22 04:48:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:48:40,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:40,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:40,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:40,676 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2020-12-22 04:48:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:40,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493721715] [2020-12-22 04:48:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 04:48:40,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493721715] [2020-12-22 04:48:40,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256247236] [2020-12-22 04:48:40,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:40,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:40,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:48:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 04:48:41,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:41,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2020-12-22 04:48:41,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848999169] [2020-12-22 04:48:41,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:48:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:48:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:48:41,080 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand 17 states. [2020-12-22 04:48:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:41,387 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2020-12-22 04:48:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:48:41,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-12-22 04:48:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:41,388 INFO L225 Difference]: With dead ends: 186 [2020-12-22 04:48:41,388 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 04:48:41,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:48:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 04:48:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2020-12-22 04:48:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 04:48:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2020-12-22 04:48:41,422 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2020-12-22 04:48:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:41,422 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2020-12-22 04:48:41,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:48:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2020-12-22 04:48:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:41,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:41,423 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:41,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 04:48:41,638 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2020-12-22 04:48:41,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:41,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458152365] [2020-12-22 04:48:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458152365] [2020-12-22 04:48:41,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049708384] [2020-12-22 04:48:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:41,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:48:41,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:48:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:42,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:42,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-22 04:48:42,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110098637] [2020-12-22 04:48:42,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:48:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:42,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:48:42,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:48:42,230 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand 23 states. [2020-12-22 04:48:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:43,620 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-12-22 04:48:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:48:43,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-12-22 04:48:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:43,621 INFO L225 Difference]: With dead ends: 263 [2020-12-22 04:48:43,622 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 04:48:43,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=1801, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 04:48:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2020-12-22 04:48:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-22 04:48:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2020-12-22 04:48:43,663 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2020-12-22 04:48:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:43,664 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2020-12-22 04:48:43,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:48:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2020-12-22 04:48:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:43,665 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:43,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:43,880 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2020-12-22 04:48:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:43,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747577951] [2020-12-22 04:48:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:44,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747577951] [2020-12-22 04:48:44,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143375661] [2020-12-22 04:48:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:44,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:48:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:48:44,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:44,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:44,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-12-22 04:48:44,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234361145] [2020-12-22 04:48:44,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:48:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:48:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:48:44,505 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand 24 states. [2020-12-22 04:48:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:45,195 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2020-12-22 04:48:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:48:45,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-12-22 04:48:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:45,197 INFO L225 Difference]: With dead ends: 251 [2020-12-22 04:48:45,197 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 04:48:45,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:48:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 04:48:45,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2020-12-22 04:48:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 04:48:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-12-22 04:48:45,234 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2020-12-22 04:48:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:45,234 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-12-22 04:48:45,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:48:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-12-22 04:48:45,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:45,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:45,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:45,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:48:45,449 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2020-12-22 04:48:45,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:45,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407023336] [2020-12-22 04:48:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407023336] [2020-12-22 04:48:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951777493] [2020-12-22 04:48:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:48:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:45,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 04:48:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321963659] [2020-12-22 04:48:45,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:48:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:48:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:48:45,675 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 13 states. [2020-12-22 04:48:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:45,789 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2020-12-22 04:48:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:48:45,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-22 04:48:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:45,790 INFO L225 Difference]: With dead ends: 227 [2020-12-22 04:48:45,790 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 04:48:45,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:48:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 04:48:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2020-12-22 04:48:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 04:48:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-12-22 04:48:45,822 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2020-12-22 04:48:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:45,822 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-12-22 04:48:45,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:48:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-12-22 04:48:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:48:45,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:45,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:46,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:46,034 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2020-12-22 04:48:46,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487139344] [2020-12-22 04:48:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:46,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487139344] [2020-12-22 04:48:46,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732880749] [2020-12-22 04:48:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:46,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:46,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:48:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:46,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:46,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 04:48:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205454438] [2020-12-22 04:48:46,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:48:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:48:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:48:46,258 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 13 states. [2020-12-22 04:48:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:46,373 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2020-12-22 04:48:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:48:46,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-12-22 04:48:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:46,375 INFO L225 Difference]: With dead ends: 178 [2020-12-22 04:48:46,375 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 04:48:46,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:48:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 04:48:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2020-12-22 04:48:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 04:48:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2020-12-22 04:48:46,405 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2020-12-22 04:48:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:46,405 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2020-12-22 04:48:46,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:48:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2020-12-22 04:48:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:48:46,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:46,406 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:46,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:48:46,607 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2020-12-22 04:48:46,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:46,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208233083] [2020-12-22 04:48:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:46,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208233083] [2020-12-22 04:48:46,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998695176] [2020-12-22 04:48:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:47,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:48:47,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:48:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:47,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:47,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:47,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-12-22 04:48:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527450578] [2020-12-22 04:48:47,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:48:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:48:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:48:47,494 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 32 states. [2020-12-22 04:48:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:48,772 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2020-12-22 04:48:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:48:48,773 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2020-12-22 04:48:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:48,775 INFO L225 Difference]: With dead ends: 305 [2020-12-22 04:48:48,775 INFO L226 Difference]: Without dead ends: 296 [2020-12-22 04:48:48,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:48:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-22 04:48:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2020-12-22 04:48:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 04:48:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2020-12-22 04:48:48,817 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2020-12-22 04:48:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:48,817 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2020-12-22 04:48:48,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:48:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2020-12-22 04:48:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:48:48,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:48,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:49,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:49,034 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2020-12-22 04:48:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:49,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103927225] [2020-12-22 04:48:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:49,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103927225] [2020-12-22 04:48:49,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386472248] [2020-12-22 04:48:49,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:49,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:48:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:49,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:48:49,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:49,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2020-12-22 04:48:49,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888745394] [2020-12-22 04:48:49,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:48:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:48:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:48:49,923 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand 30 states. [2020-12-22 04:48:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:50,986 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2020-12-22 04:48:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:48:50,987 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:48:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:50,988 INFO L225 Difference]: With dead ends: 223 [2020-12-22 04:48:50,988 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 04:48:50,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 04:48:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2020-12-22 04:48:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 04:48:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2020-12-22 04:48:51,028 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2020-12-22 04:48:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:51,028 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2020-12-22 04:48:51,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:48:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2020-12-22 04:48:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:48:51,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:51,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:51,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:48:51,229 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2020-12-22 04:48:51,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:51,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031529918] [2020-12-22 04:48:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:48:51,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031529918] [2020-12-22 04:48:51,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108916469] [2020-12-22 04:48:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:51,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 04:48:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:51,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:48:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:51,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:48:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:48:51,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:51,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-22 04:48:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695053491] [2020-12-22 04:48:51,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:48:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:48:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:48:51,957 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand 28 states. [2020-12-22 04:48:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:52,727 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-12-22 04:48:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:48:52,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-12-22 04:48:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:52,729 INFO L225 Difference]: With dead ends: 198 [2020-12-22 04:48:52,729 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 04:48:52,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:48:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 04:48:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2020-12-22 04:48:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 04:48:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2020-12-22 04:48:52,766 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2020-12-22 04:48:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:52,766 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2020-12-22 04:48:52,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:48:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2020-12-22 04:48:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:52,766 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:52,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:48:52,967 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:52,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2020-12-22 04:48:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:52,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315172907] [2020-12-22 04:48:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315172907] [2020-12-22 04:48:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280627449] [2020-12-22 04:48:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:53,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:48:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:48:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:53,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-12-22 04:48:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7191197] [2020-12-22 04:48:53,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:48:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:48:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:48:53,699 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 27 states. [2020-12-22 04:48:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:55,880 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2020-12-22 04:48:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:48:55,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-22 04:48:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:55,882 INFO L225 Difference]: With dead ends: 299 [2020-12-22 04:48:55,882 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 04:48:55,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=716, Invalid=2944, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:48:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 04:48:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2020-12-22 04:48:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 04:48:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2020-12-22 04:48:55,919 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2020-12-22 04:48:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:55,919 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2020-12-22 04:48:55,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:48:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2020-12-22 04:48:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:55,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:55,920 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:56,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:48:56,133 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2020-12-22 04:48:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:56,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152746214] [2020-12-22 04:48:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152746214] [2020-12-22 04:48:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484918725] [2020-12-22 04:48:56,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:48:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:48:56,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:56,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2020-12-22 04:48:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447695425] [2020-12-22 04:48:56,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:48:56,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:48:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:48:56,893 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand 28 states. [2020-12-22 04:48:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:57,705 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2020-12-22 04:48:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:57,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-12-22 04:48:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:57,707 INFO L225 Difference]: With dead ends: 286 [2020-12-22 04:48:57,707 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 04:48:57,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:48:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 04:48:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2020-12-22 04:48:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 04:48:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2020-12-22 04:48:57,752 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2020-12-22 04:48:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:57,753 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2020-12-22 04:48:57,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:48:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2020-12-22 04:48:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:57,754 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:57,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 04:48:57,966 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2020-12-22 04:48:57,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:57,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676299757] [2020-12-22 04:48:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:58,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676299757] [2020-12-22 04:48:58,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809890849] [2020-12-22 04:48:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:58,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:48:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:58,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:58,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-22 04:48:58,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202841613] [2020-12-22 04:48:58,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:48:58,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:48:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:48:58,215 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand 15 states. [2020-12-22 04:48:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:58,425 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-12-22 04:48:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:58,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-22 04:48:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:58,426 INFO L225 Difference]: With dead ends: 247 [2020-12-22 04:48:58,427 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 04:48:58,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:48:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 04:48:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2020-12-22 04:48:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 04:48:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2020-12-22 04:48:58,483 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2020-12-22 04:48:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:58,483 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2020-12-22 04:48:58,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:48:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2020-12-22 04:48:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:48:58,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:58,484 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:58,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:58,699 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2020-12-22 04:48:58,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:58,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199918637] [2020-12-22 04:48:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:58,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199918637] [2020-12-22 04:48:58,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597071188] [2020-12-22 04:48:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:58,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:48:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:48:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:48:58,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:58,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-22 04:48:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601218611] [2020-12-22 04:48:58,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:48:58,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:48:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:48:58,947 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand 15 states. [2020-12-22 04:48:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:59,174 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2020-12-22 04:48:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:48:59,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-22 04:48:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:59,177 INFO L225 Difference]: With dead ends: 443 [2020-12-22 04:48:59,177 INFO L226 Difference]: Without dead ends: 353 [2020-12-22 04:48:59,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:48:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-12-22 04:48:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2020-12-22 04:48:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-22 04:48:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2020-12-22 04:48:59,229 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2020-12-22 04:48:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:59,229 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2020-12-22 04:48:59,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:48:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2020-12-22 04:48:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:48:59,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:59,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:59,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:48:59,444 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2020-12-22 04:48:59,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:59,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253072425] [2020-12-22 04:48:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:48:59,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253072425] [2020-12-22 04:48:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296906062] [2020-12-22 04:48:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:59,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:48:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:00,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:49:00,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:00,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2020-12-22 04:49:00,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691685730] [2020-12-22 04:49:00,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:49:00,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:49:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:49:00,553 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 35 states. [2020-12-22 04:49:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:02,404 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2020-12-22 04:49:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:49:02,405 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2020-12-22 04:49:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:02,408 INFO L225 Difference]: With dead ends: 464 [2020-12-22 04:49:02,408 INFO L226 Difference]: Without dead ends: 455 [2020-12-22 04:49:02,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=270, Invalid=3036, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-12-22 04:49:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2020-12-22 04:49:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 04:49:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2020-12-22 04:49:02,477 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2020-12-22 04:49:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:02,477 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2020-12-22 04:49:02,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:49:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2020-12-22 04:49:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:49:02,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:02,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:02,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 04:49:02,689 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2020-12-22 04:49:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:02,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532387440] [2020-12-22 04:49:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532387440] [2020-12-22 04:49:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277674344] [2020-12-22 04:49:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:03,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 04:49:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:49:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:03,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2020-12-22 04:49:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285694792] [2020-12-22 04:49:03,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:49:03,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:49:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:49:03,731 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand 33 states. [2020-12-22 04:49:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:05,124 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2020-12-22 04:49:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:49:05,127 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2020-12-22 04:49:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:05,129 INFO L225 Difference]: With dead ends: 364 [2020-12-22 04:49:05,129 INFO L226 Difference]: Without dead ends: 340 [2020-12-22 04:49:05,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:49:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-22 04:49:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2020-12-22 04:49:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-22 04:49:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2020-12-22 04:49:05,181 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2020-12-22 04:49:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:05,181 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2020-12-22 04:49:05,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:49:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2020-12-22 04:49:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:49:05,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:05,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:05,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:05,389 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2020-12-22 04:49:05,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:05,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430308115] [2020-12-22 04:49:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 04:49:05,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430308115] [2020-12-22 04:49:05,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237485219] [2020-12-22 04:49:05,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:05,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 04:49:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:05,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:49:05,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 04:49:05,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:05,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-22 04:49:05,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016209678] [2020-12-22 04:49:05,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:49:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:49:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:49:05,901 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand 20 states. [2020-12-22 04:49:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:06,796 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2020-12-22 04:49:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:49:06,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2020-12-22 04:49:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:06,802 INFO L225 Difference]: With dead ends: 359 [2020-12-22 04:49:06,802 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 04:49:06,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:49:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 04:49:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2020-12-22 04:49:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 04:49:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2020-12-22 04:49:06,879 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2020-12-22 04:49:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:06,879 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2020-12-22 04:49:06,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:49:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2020-12-22 04:49:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:49:06,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:06,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:07,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:49:07,080 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2020-12-22 04:49:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:07,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620199106] [2020-12-22 04:49:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:07,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620199106] [2020-12-22 04:49:07,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575054292] [2020-12-22 04:49:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:49:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:07,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:08,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:08,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2020-12-22 04:49:08,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508139240] [2020-12-22 04:49:08,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:49:08,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:49:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:49:08,027 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand 31 states. [2020-12-22 04:49:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:09,114 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2020-12-22 04:49:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:49:09,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-22 04:49:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:09,118 INFO L225 Difference]: With dead ends: 352 [2020-12-22 04:49:09,118 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 04:49:09,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:49:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 04:49:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-12-22 04:49:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 04:49:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2020-12-22 04:49:09,213 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2020-12-22 04:49:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:09,213 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2020-12-22 04:49:09,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:49:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2020-12-22 04:49:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:49:09,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:09,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:09,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:09,429 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2020-12-22 04:49:09,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034916312] [2020-12-22 04:49:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 04:49:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034916312] [2020-12-22 04:49:09,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164749635] [2020-12-22 04:49:09,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:09,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:49:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 04:49:09,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:09,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2020-12-22 04:49:09,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557894794] [2020-12-22 04:49:09,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:49:09,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:49:09,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:49:09,950 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand 21 states. [2020-12-22 04:49:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:10,426 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2020-12-22 04:49:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:49:10,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-12-22 04:49:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:10,428 INFO L225 Difference]: With dead ends: 318 [2020-12-22 04:49:10,428 INFO L226 Difference]: Without dead ends: 294 [2020-12-22 04:49:10,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:49:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-22 04:49:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2020-12-22 04:49:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 04:49:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2020-12-22 04:49:10,511 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2020-12-22 04:49:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:10,512 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2020-12-22 04:49:10,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:49:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2020-12-22 04:49:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:49:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:10,513 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:10,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:49:10,728 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2020-12-22 04:49:10,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:10,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251389339] [2020-12-22 04:49:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:10,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251389339] [2020-12-22 04:49:10,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325884991] [2020-12-22 04:49:10,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:11,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:49:11,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:49:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:11,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:11,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-12-22 04:49:11,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17599276] [2020-12-22 04:49:11,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:49:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:49:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:49:11,717 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand 31 states. [2020-12-22 04:49:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:14,948 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2020-12-22 04:49:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:49:14,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-22 04:49:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:14,950 INFO L225 Difference]: With dead ends: 470 [2020-12-22 04:49:14,950 INFO L226 Difference]: Without dead ends: 434 [2020-12-22 04:49:14,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1061, Invalid=4489, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:49:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-22 04:49:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2020-12-22 04:49:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 04:49:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2020-12-22 04:49:15,051 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2020-12-22 04:49:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:15,051 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2020-12-22 04:49:15,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:49:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2020-12-22 04:49:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:49:15,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:15,052 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:15,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:49:15,267 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2020-12-22 04:49:15,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:15,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463743472] [2020-12-22 04:49:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463743472] [2020-12-22 04:49:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729921603] [2020-12-22 04:49:15,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:15,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:49:15,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:16,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:16,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2020-12-22 04:49:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146477247] [2020-12-22 04:49:16,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:49:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:49:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:49:16,342 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand 32 states. [2020-12-22 04:49:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:17,663 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2020-12-22 04:49:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:49:17,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-22 04:49:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:17,666 INFO L225 Difference]: With dead ends: 456 [2020-12-22 04:49:17,666 INFO L226 Difference]: Without dead ends: 438 [2020-12-22 04:49:17,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:49:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-22 04:49:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2020-12-22 04:49:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-22 04:49:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2020-12-22 04:49:17,771 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2020-12-22 04:49:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:17,771 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2020-12-22 04:49:17,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:49:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2020-12-22 04:49:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:49:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:17,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:17,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:49:17,987 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2020-12-22 04:49:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:17,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181025203] [2020-12-22 04:49:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:18,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181025203] [2020-12-22 04:49:18,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815278250] [2020-12-22 04:49:18,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:18,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 04:49:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:49:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:18,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:18,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-22 04:49:18,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657236601] [2020-12-22 04:49:18,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:49:18,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:49:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:49:18,249 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand 16 states. [2020-12-22 04:49:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:18,534 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2020-12-22 04:49:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:49:18,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-22 04:49:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:18,537 INFO L225 Difference]: With dead ends: 394 [2020-12-22 04:49:18,537 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 04:49:18,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:49:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 04:49:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2020-12-22 04:49:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-22 04:49:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2020-12-22 04:49:18,637 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2020-12-22 04:49:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:18,637 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2020-12-22 04:49:18,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:49:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2020-12-22 04:49:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:49:18,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:18,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:18,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 04:49:18,852 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2020-12-22 04:49:18,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:18,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760947515] [2020-12-22 04:49:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760947515] [2020-12-22 04:49:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137522768] [2020-12-22 04:49:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:19,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 04:49:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:49:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:19,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:19,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-22 04:49:19,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692051400] [2020-12-22 04:49:19,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:49:19,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:49:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:49:19,117 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand 16 states. [2020-12-22 04:49:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:19,375 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2020-12-22 04:49:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:49:19,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-12-22 04:49:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:19,382 INFO L225 Difference]: With dead ends: 321 [2020-12-22 04:49:19,382 INFO L226 Difference]: Without dead ends: 315 [2020-12-22 04:49:19,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:49:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-22 04:49:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2020-12-22 04:49:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 04:49:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-12-22 04:49:19,472 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2020-12-22 04:49:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:19,472 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-12-22 04:49:19,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:49:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-12-22 04:49:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:49:19,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:19,473 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:19,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:19,688 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2020-12-22 04:49:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:19,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888798801] [2020-12-22 04:49:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:49:20,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888798801] [2020-12-22 04:49:20,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360914368] [2020-12-22 04:49:20,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:49:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:21,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:49:21,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:21,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2020-12-22 04:49:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387790936] [2020-12-22 04:49:21,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:49:21,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:21,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:49:21,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:49:21,058 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 38 states. [2020-12-22 04:49:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:23,235 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2020-12-22 04:49:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:49:23,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 36 [2020-12-22 04:49:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:23,237 INFO L225 Difference]: With dead ends: 540 [2020-12-22 04:49:23,237 INFO L226 Difference]: Without dead ends: 531 [2020-12-22 04:49:23,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=289, Invalid=3617, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:49:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-12-22 04:49:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2020-12-22 04:49:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 04:49:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2020-12-22 04:49:23,316 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2020-12-22 04:49:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:23,316 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2020-12-22 04:49:23,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:49:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2020-12-22 04:49:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:49:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:23,317 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:23,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:49:23,518 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2020-12-22 04:49:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:23,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130839418] [2020-12-22 04:49:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130839418] [2020-12-22 04:49:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401918550] [2020-12-22 04:49:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:24,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:49:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:24,743 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:24,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:24,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2020-12-22 04:49:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885778703] [2020-12-22 04:49:24,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:49:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:49:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:49:24,795 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand 36 states. [2020-12-22 04:49:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:26,556 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2020-12-22 04:49:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:49:26,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2020-12-22 04:49:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:26,558 INFO L225 Difference]: With dead ends: 427 [2020-12-22 04:49:26,558 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 04:49:26,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=264, Invalid=3042, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 04:49:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2020-12-22 04:49:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 04:49:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2020-12-22 04:49:26,635 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2020-12-22 04:49:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:26,635 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2020-12-22 04:49:26,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:49:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2020-12-22 04:49:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:49:26,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:26,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:26,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:26,850 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2020-12-22 04:49:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:26,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99672405] [2020-12-22 04:49:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99672405] [2020-12-22 04:49:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596320887] [2020-12-22 04:49:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:27,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:49:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:49:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:27,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:28,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:28,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2020-12-22 04:49:28,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174507029] [2020-12-22 04:49:28,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:49:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:49:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:49:28,046 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand 34 states. [2020-12-22 04:49:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:29,467 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2020-12-22 04:49:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:49:29,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:49:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:29,471 INFO L225 Difference]: With dead ends: 352 [2020-12-22 04:49:29,471 INFO L226 Difference]: Without dead ends: 326 [2020-12-22 04:49:29,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:49:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-22 04:49:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2020-12-22 04:49:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 04:49:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2020-12-22 04:49:29,572 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2020-12-22 04:49:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:29,573 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2020-12-22 04:49:29,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:49:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2020-12-22 04:49:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:49:29,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:29,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:29,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 04:49:29,790 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2020-12-22 04:49:29,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:29,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10597628] [2020-12-22 04:49:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:49:30,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10597628] [2020-12-22 04:49:30,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126736729] [2020-12-22 04:49:30,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:30,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:49:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:30,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:49:30,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:30,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-12-22 04:49:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233404935] [2020-12-22 04:49:30,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:49:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:49:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:49:30,867 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand 32 states. [2020-12-22 04:49:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:31,992 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2020-12-22 04:49:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:31,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-12-22 04:49:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:31,994 INFO L225 Difference]: With dead ends: 324 [2020-12-22 04:49:31,994 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 04:49:31,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:49:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 04:49:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2020-12-22 04:49:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-22 04:49:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2020-12-22 04:49:32,073 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2020-12-22 04:49:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:32,073 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2020-12-22 04:49:32,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:49:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2020-12-22 04:49:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:49:32,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:32,074 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:32,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:49:32,288 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2020-12-22 04:49:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:32,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028982015] [2020-12-22 04:49:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028982015] [2020-12-22 04:49:32,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903580278] [2020-12-22 04:49:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:32,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:49:32,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:32,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:49:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:33,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:33,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2020-12-22 04:49:33,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397140752] [2020-12-22 04:49:33,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:49:33,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:33,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:49:33,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:49:33,565 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand 35 states. [2020-12-22 04:49:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,213 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2020-12-22 04:49:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:49:38,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:49:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,215 INFO L225 Difference]: With dead ends: 520 [2020-12-22 04:49:38,215 INFO L226 Difference]: Without dead ends: 482 [2020-12-22 04:49:38,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1504, Invalid=6506, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:49:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-22 04:49:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2020-12-22 04:49:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-22 04:49:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2020-12-22 04:49:38,290 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2020-12-22 04:49:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,290 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2020-12-22 04:49:38,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:49:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2020-12-22 04:49:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:49:38,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:38,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,492 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2020-12-22 04:49:38,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235919015] [2020-12-22 04:49:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235919015] [2020-12-22 04:49:38,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968327826] [2020-12-22 04:49:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:38,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 04:49:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:38,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:49:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:39,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:39,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2020-12-22 04:49:39,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469906476] [2020-12-22 04:49:39,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:49:39,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:49:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:49:39,874 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand 36 states. [2020-12-22 04:49:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:41,775 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2020-12-22 04:49:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:49:41,776 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 37 [2020-12-22 04:49:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:41,782 INFO L225 Difference]: With dead ends: 505 [2020-12-22 04:49:41,782 INFO L226 Difference]: Without dead ends: 486 [2020-12-22 04:49:41,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:49:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-22 04:49:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2020-12-22 04:49:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 04:49:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2020-12-22 04:49:41,900 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2020-12-22 04:49:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:41,900 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2020-12-22 04:49:41,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:49:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2020-12-22 04:49:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:49:41,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:41,901 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:42,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 04:49:42,117 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2020-12-22 04:49:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:42,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677534547] [2020-12-22 04:49:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:42,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677534547] [2020-12-22 04:49:42,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881457726] [2020-12-22 04:49:42,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:42,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:49:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:42,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:42,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-22 04:49:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746584340] [2020-12-22 04:49:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:49:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:49:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:49:42,441 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand 18 states. [2020-12-22 04:49:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:42,916 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2020-12-22 04:49:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:42,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-22 04:49:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:42,917 INFO L225 Difference]: With dead ends: 404 [2020-12-22 04:49:42,918 INFO L226 Difference]: Without dead ends: 389 [2020-12-22 04:49:42,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:49:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-22 04:49:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2020-12-22 04:49:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-12-22 04:49:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2020-12-22 04:49:43,021 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2020-12-22 04:49:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:43,022 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2020-12-22 04:49:43,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:49:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2020-12-22 04:49:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:49:43,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:43,023 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:43,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 04:49:43,238 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2020-12-22 04:49:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861233860] [2020-12-22 04:49:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:43,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861233860] [2020-12-22 04:49:43,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005284783] [2020-12-22 04:49:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:43,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:49:43,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 04:49:43,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:43,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-22 04:49:43,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638052379] [2020-12-22 04:49:43,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:49:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:43,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:49:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:49:43,561 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand 18 states. [2020-12-22 04:49:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:44,011 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2020-12-22 04:49:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:49:44,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-22 04:49:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:44,014 INFO L225 Difference]: With dead ends: 685 [2020-12-22 04:49:44,014 INFO L226 Difference]: Without dead ends: 561 [2020-12-22 04:49:44,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:49:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-12-22 04:49:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2020-12-22 04:49:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-22 04:49:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2020-12-22 04:49:44,126 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2020-12-22 04:49:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:44,126 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2020-12-22 04:49:44,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:49:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2020-12-22 04:49:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:49:44,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:44,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:44,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:49:44,335 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2020-12-22 04:49:44,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:44,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998932672] [2020-12-22 04:49:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:49:45,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998932672] [2020-12-22 04:49:45,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560684516] [2020-12-22 04:49:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:45,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 04:49:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:49:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:45,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:49:46,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:46,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2020-12-22 04:49:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492679603] [2020-12-22 04:49:46,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:49:46,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:49:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:49:46,053 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 41 states. [2020-12-22 04:49:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:49,111 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2020-12-22 04:49:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:49:49,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 38 [2020-12-22 04:49:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:49,114 INFO L225 Difference]: With dead ends: 761 [2020-12-22 04:49:49,114 INFO L226 Difference]: Without dead ends: 752 [2020-12-22 04:49:49,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=308, Invalid=4248, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:49:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-12-22 04:49:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2020-12-22 04:49:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-22 04:49:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2020-12-22 04:49:49,221 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2020-12-22 04:49:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:49,221 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2020-12-22 04:49:49,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:49:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2020-12-22 04:49:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:49:49,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:49,222 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:49,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:49,438 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2020-12-22 04:49:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:49,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814403642] [2020-12-22 04:49:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814403642] [2020-12-22 04:49:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377850793] [2020-12-22 04:49:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:50,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:49:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:50,981 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:49:51,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:51,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2020-12-22 04:49:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054298600] [2020-12-22 04:49:51,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:49:51,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:49:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1387, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:49:51,040 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand 39 states. [2020-12-22 04:49:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:53,596 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2020-12-22 04:49:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:49:53,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2020-12-22 04:49:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:53,599 INFO L225 Difference]: With dead ends: 623 [2020-12-22 04:49:53,599 INFO L226 Difference]: Without dead ends: 597 [2020-12-22 04:49:53,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:49:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-12-22 04:49:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2020-12-22 04:49:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-22 04:49:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2020-12-22 04:49:53,717 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2020-12-22 04:49:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:53,717 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2020-12-22 04:49:53,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:49:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2020-12-22 04:49:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:49:53,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:53,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:53,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:53,919 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:53,920 INFO L82 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2020-12-22 04:49:53,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:53,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066781650] [2020-12-22 04:49:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:54,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066781650] [2020-12-22 04:49:54,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7920112] [2020-12-22 04:49:54,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:54,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 04:49:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:49:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:55,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:49:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:49:55,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:55,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2020-12-22 04:49:55,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411442152] [2020-12-22 04:49:55,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:49:55,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:49:55,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:49:55,419 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand 37 states. [2020-12-22 04:49:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:57,384 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2020-12-22 04:49:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:49:57,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2020-12-22 04:49:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:57,388 INFO L225 Difference]: With dead ends: 530 [2020-12-22 04:49:57,388 INFO L226 Difference]: Without dead ends: 503 [2020-12-22 04:49:57,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:49:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-12-22 04:49:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2020-12-22 04:49:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-22 04:49:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2020-12-22 04:49:57,482 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2020-12-22 04:49:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:57,482 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2020-12-22 04:49:57,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:49:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2020-12-22 04:49:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:49:57,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:57,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:57,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:57,697 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2020-12-22 04:49:57,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:57,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507238486] [2020-12-22 04:49:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 04:49:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507238486] [2020-12-22 04:49:57,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275255342] [2020-12-22 04:49:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:57,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:49:57,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:49:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 04:49:58,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:58,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-12-22 04:49:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838304960] [2020-12-22 04:49:58,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:49:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:49:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:49:58,439 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand 24 states. [2020-12-22 04:50:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:00,157 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2020-12-22 04:50:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:50:00,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-12-22 04:50:00,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:00,160 INFO L225 Difference]: With dead ends: 556 [2020-12-22 04:50:00,160 INFO L226 Difference]: Without dead ends: 502 [2020-12-22 04:50:00,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:50:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-22 04:50:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2020-12-22 04:50:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-12-22 04:50:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2020-12-22 04:50:00,295 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2020-12-22 04:50:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:00,295 INFO L481 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2020-12-22 04:50:00,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:50:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2020-12-22 04:50:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:50:00,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:00,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:00,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:00,502 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2020-12-22 04:50:00,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:00,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067078] [2020-12-22 04:50:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:50:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067078] [2020-12-22 04:50:01,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464497816] [2020-12-22 04:50:01,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:50:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:01,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:50:01,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:01,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2020-12-22 04:50:01,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032784009] [2020-12-22 04:50:01,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:50:01,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:50:01,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:50:01,863 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand 35 states. [2020-12-22 04:50:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:03,518 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2020-12-22 04:50:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:50:03,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-22 04:50:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:03,522 INFO L225 Difference]: With dead ends: 532 [2020-12-22 04:50:03,522 INFO L226 Difference]: Without dead ends: 504 [2020-12-22 04:50:03,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=270, Invalid=2700, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:50:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-22 04:50:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2020-12-22 04:50:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 04:50:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2020-12-22 04:50:03,637 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2020-12-22 04:50:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:03,637 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2020-12-22 04:50:03,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:50:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2020-12-22 04:50:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:50:03,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:03,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:03,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-22 04:50:03,840 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2020-12-22 04:50:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522044385] [2020-12-22 04:50:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 04:50:04,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522044385] [2020-12-22 04:50:04,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014355897] [2020-12-22 04:50:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:04,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:50:04,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:50:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 04:50:04,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:04,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2020-12-22 04:50:04,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729270870] [2020-12-22 04:50:04,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:50:04,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:04,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:50:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:50:04,661 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand 25 states. [2020-12-22 04:50:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:05,560 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2020-12-22 04:50:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:50:05,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-22 04:50:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:05,562 INFO L225 Difference]: With dead ends: 505 [2020-12-22 04:50:05,562 INFO L226 Difference]: Without dead ends: 476 [2020-12-22 04:50:05,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:50:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-12-22 04:50:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2020-12-22 04:50:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 04:50:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2020-12-22 04:50:05,701 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2020-12-22 04:50:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:05,701 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2020-12-22 04:50:05,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:50:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2020-12-22 04:50:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:50:05,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:05,702 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:05,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:05,903 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2020-12-22 04:50:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:05,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202047809] [2020-12-22 04:50:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:06,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202047809] [2020-12-22 04:50:06,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974433517] [2020-12-22 04:50:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:06,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:50:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:50:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:07,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:07,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2020-12-22 04:50:07,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600762865] [2020-12-22 04:50:07,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:50:07,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:50:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:50:07,644 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand 39 states. [2020-12-22 04:50:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:14,542 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2020-12-22 04:50:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:50:14,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2020-12-22 04:50:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:14,545 INFO L225 Difference]: With dead ends: 768 [2020-12-22 04:50:14,545 INFO L226 Difference]: Without dead ends: 726 [2020-12-22 04:50:14,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2060, Invalid=9070, Unknown=0, NotChecked=0, Total=11130 [2020-12-22 04:50:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-12-22 04:50:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2020-12-22 04:50:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-12-22 04:50:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2020-12-22 04:50:14,697 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2020-12-22 04:50:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:14,697 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2020-12-22 04:50:14,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:50:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2020-12-22 04:50:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:50:14,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:14,698 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:14,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 04:50:14,903 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2020-12-22 04:50:14,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:14,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114520866] [2020-12-22 04:50:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:15,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114520866] [2020-12-22 04:50:15,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586062319] [2020-12-22 04:50:15,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:15,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:50:15,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:50:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:16,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:16,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2020-12-22 04:50:16,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140204510] [2020-12-22 04:50:16,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:50:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:50:16,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:50:16,751 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand 40 states. [2020-12-22 04:50:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:19,288 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2020-12-22 04:50:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:50:19,289 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2020-12-22 04:50:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:19,291 INFO L225 Difference]: With dead ends: 752 [2020-12-22 04:50:19,291 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 04:50:19,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:50:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 04:50:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2020-12-22 04:50:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-22 04:50:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2020-12-22 04:50:19,444 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2020-12-22 04:50:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:19,444 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2020-12-22 04:50:19,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:50:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2020-12-22 04:50:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:50:19,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:19,445 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:19,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:19,651 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2020-12-22 04:50:19,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:19,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530628674] [2020-12-22 04:50:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:50:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530628674] [2020-12-22 04:50:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995847902] [2020-12-22 04:50:19,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:19,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:50:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:50:19,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:50:20,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:20,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-22 04:50:20,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391301942] [2020-12-22 04:50:20,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:50:20,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:50:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:50:20,023 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand 19 states. [2020-12-22 04:50:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:20,589 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2020-12-22 04:50:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:50:20,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-22 04:50:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:20,593 INFO L225 Difference]: With dead ends: 622 [2020-12-22 04:50:20,593 INFO L226 Difference]: Without dead ends: 514 [2020-12-22 04:50:20,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:50:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-12-22 04:50:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2020-12-22 04:50:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-12-22 04:50:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2020-12-22 04:50:20,734 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2020-12-22 04:50:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:20,734 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2020-12-22 04:50:20,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:50:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2020-12-22 04:50:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:50:20,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:20,735 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:20,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 04:50:20,936 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2020-12-22 04:50:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:20,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461846489] [2020-12-22 04:50:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:50:21,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461846489] [2020-12-22 04:50:21,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957657501] [2020-12-22 04:50:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:21,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:50:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:50:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:50:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-22 04:50:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484747311] [2020-12-22 04:50:21,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:50:21,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:50:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:50:21,323 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand 19 states. [2020-12-22 04:50:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:21,816 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2020-12-22 04:50:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:50:21,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-22 04:50:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:21,821 INFO L225 Difference]: With dead ends: 521 [2020-12-22 04:50:21,821 INFO L226 Difference]: Without dead ends: 515 [2020-12-22 04:50:21,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:50:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-12-22 04:50:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2020-12-22 04:50:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-12-22 04:50:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2020-12-22 04:50:21,955 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2020-12-22 04:50:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:21,955 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2020-12-22 04:50:21,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:50:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2020-12-22 04:50:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:50:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:21,956 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:22,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:22,157 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2020-12-22 04:50:22,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:22,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823571109] [2020-12-22 04:50:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:50:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823571109] [2020-12-22 04:50:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444836262] [2020-12-22 04:50:23,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:50:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:24,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:50:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:24,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2020-12-22 04:50:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635420349] [2020-12-22 04:50:24,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:50:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:50:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:50:24,298 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 44 states. [2020-12-22 04:50:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:28,384 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2020-12-22 04:50:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:50:28,385 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 40 [2020-12-22 04:50:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:28,388 INFO L225 Difference]: With dead ends: 872 [2020-12-22 04:50:28,388 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 04:50:28,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:50:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 04:50:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2020-12-22 04:50:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 04:50:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2020-12-22 04:50:28,532 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2020-12-22 04:50:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:28,533 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2020-12-22 04:50:28,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:50:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2020-12-22 04:50:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:50:28,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:28,533 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:28,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:28,742 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2020-12-22 04:50:28,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:28,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150076286] [2020-12-22 04:50:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:50:29,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150076286] [2020-12-22 04:50:29,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942366579] [2020-12-22 04:50:29,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:29,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:50:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:29,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:50:29,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:30,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:50:30,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:30,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2020-12-22 04:50:30,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436952191] [2020-12-22 04:50:30,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:50:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:50:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1620, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:50:30,807 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand 42 states. [2020-12-22 04:50:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:34,190 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2020-12-22 04:50:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:50:34,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 40 [2020-12-22 04:50:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:34,193 INFO L225 Difference]: With dead ends: 719 [2020-12-22 04:50:34,193 INFO L226 Difference]: Without dead ends: 692 [2020-12-22 04:50:34,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=300, Invalid=4256, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:50:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-12-22 04:50:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2020-12-22 04:50:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-12-22 04:50:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2020-12-22 04:50:34,352 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2020-12-22 04:50:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:34,352 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2020-12-22 04:50:34,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:50:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2020-12-22 04:50:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:50:34,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:34,353 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:34,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 04:50:34,554 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2020-12-22 04:50:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:34,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489849709] [2020-12-22 04:50:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:50:35,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489849709] [2020-12-22 04:50:35,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984193519] [2020-12-22 04:50:35,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:35,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:50:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:50:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:36,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:50:36,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:36,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2020-12-22 04:50:36,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305577520] [2020-12-22 04:50:36,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:50:36,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:50:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:50:36,471 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand 40 states. [2020-12-22 04:50:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:39,246 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2020-12-22 04:50:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:50:39,247 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2020-12-22 04:50:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:39,249 INFO L225 Difference]: With dead ends: 617 [2020-12-22 04:50:39,249 INFO L226 Difference]: Without dead ends: 589 [2020-12-22 04:50:39,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:50:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-12-22 04:50:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2020-12-22 04:50:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 04:50:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2020-12-22 04:50:39,404 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2020-12-22 04:50:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2020-12-22 04:50:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:50:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2020-12-22 04:50:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:50:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:39,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:39,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:39,607 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2020-12-22 04:50:39,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:39,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053514454] [2020-12-22 04:50:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:50:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053514454] [2020-12-22 04:50:40,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981104769] [2020-12-22 04:50:40,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:40,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:50:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:50:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:41,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:50:41,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:41,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 38 [2020-12-22 04:50:41,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325508898] [2020-12-22 04:50:41,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:50:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:50:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:50:41,517 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand 38 states. [2020-12-22 04:50:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:43,744 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2020-12-22 04:50:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:50:43,746 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:50:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:43,748 INFO L225 Difference]: With dead ends: 535 [2020-12-22 04:50:43,748 INFO L226 Difference]: Without dead ends: 506 [2020-12-22 04:50:43,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=288, Invalid=3252, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:50:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-12-22 04:50:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2020-12-22 04:50:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-12-22 04:50:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2020-12-22 04:50:43,894 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2020-12-22 04:50:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:43,895 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2020-12-22 04:50:43,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:50:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2020-12-22 04:50:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:50:43,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:43,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:44,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:44,097 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2020-12-22 04:50:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:44,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708781610] [2020-12-22 04:50:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 04:50:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708781610] [2020-12-22 04:50:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393399955] [2020-12-22 04:50:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:44,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:50:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:50:44,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:45,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:50:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 04:50:45,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:45,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2020-12-22 04:50:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302440203] [2020-12-22 04:50:45,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:50:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:50:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:50:45,743 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand 36 states. [2020-12-22 04:50:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:47,484 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2020-12-22 04:50:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:50:47,486 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-12-22 04:50:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:47,488 INFO L225 Difference]: With dead ends: 504 [2020-12-22 04:50:47,488 INFO L226 Difference]: Without dead ends: 498 [2020-12-22 04:50:47,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:50:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-22 04:50:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2020-12-22 04:50:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 04:50:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2020-12-22 04:50:47,635 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2020-12-22 04:50:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:47,635 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2020-12-22 04:50:47,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:50:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2020-12-22 04:50:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:50:47,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:47,636 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:47,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 04:50:47,837 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2020-12-22 04:50:47,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:47,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181244447] [2020-12-22 04:50:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:48,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181244447] [2020-12-22 04:50:48,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239802829] [2020-12-22 04:50:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:50:48,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 04:50:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:50:48,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:50:50,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:50,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2020-12-22 04:50:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001921361] [2020-12-22 04:50:50,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:50:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:50:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:50:50,164 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand 43 states. [2020-12-22 04:50:57,696 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-12-22 04:50:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:59,768 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2020-12-22 04:50:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 04:50:59,770 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 41 [2020-12-22 04:50:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:59,773 INFO L225 Difference]: With dead ends: 834 [2020-12-22 04:50:59,773 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 04:50:59,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2745, Invalid=12261, Unknown=0, NotChecked=0, Total=15006 [2020-12-22 04:50:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 04:50:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2020-12-22 04:50:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-22 04:50:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2020-12-22 04:50:59,945 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2020-12-22 04:50:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:59,945 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2020-12-22 04:50:59,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:50:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2020-12-22 04:50:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:50:59,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:59,946 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:00,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:00,147 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2020-12-22 04:51:00,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:00,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539287631] [2020-12-22 04:51:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:51:00,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539287631] [2020-12-22 04:51:00,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838178593] [2020-12-22 04:51:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:51:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:51:02,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:02,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 44 [2020-12-22 04:51:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781542565] [2020-12-22 04:51:02,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:51:02,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:02,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:51:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:51:02,814 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand 44 states. [2020-12-22 04:51:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:06,642 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2020-12-22 04:51:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:51:06,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 41 [2020-12-22 04:51:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:06,647 INFO L225 Difference]: With dead ends: 817 [2020-12-22 04:51:06,648 INFO L226 Difference]: Without dead ends: 795 [2020-12-22 04:51:06,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=243, Invalid=2727, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:51:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-12-22 04:51:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2020-12-22 04:51:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-12-22 04:51:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2020-12-22 04:51:06,813 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2020-12-22 04:51:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:06,813 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2020-12-22 04:51:06,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:51:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2020-12-22 04:51:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:51:06,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:06,814 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:07,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-22 04:51:07,015 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2020-12-22 04:51:07,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:07,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95239613] [2020-12-22 04:51:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:51:07,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95239613] [2020-12-22 04:51:07,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203656710] [2020-12-22 04:51:07,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:07,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:07,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:07,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:51:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:51:07,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:07,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-22 04:51:07,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47389496] [2020-12-22 04:51:07,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:51:07,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:51:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:51:07,539 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand 21 states. [2020-12-22 04:51:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:08,338 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2020-12-22 04:51:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:51:08,339 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-22 04:51:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:08,341 INFO L225 Difference]: With dead ends: 618 [2020-12-22 04:51:08,341 INFO L226 Difference]: Without dead ends: 602 [2020-12-22 04:51:08,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:51:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-12-22 04:51:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2020-12-22 04:51:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-12-22 04:51:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2020-12-22 04:51:08,519 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2020-12-22 04:51:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:08,519 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2020-12-22 04:51:08,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:51:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2020-12-22 04:51:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:51:08,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:08,520 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:08,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 04:51:08,721 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2020-12-22 04:51:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368164329] [2020-12-22 04:51:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:51:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368164329] [2020-12-22 04:51:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863669658] [2020-12-22 04:51:08,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:08,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:51:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:51:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 04:51:09,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:09,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-22 04:51:09,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569012191] [2020-12-22 04:51:09,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:51:09,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:51:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:51:09,231 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand 21 states. [2020-12-22 04:51:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:10,140 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2020-12-22 04:51:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:51:10,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-22 04:51:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:10,145 INFO L225 Difference]: With dead ends: 996 [2020-12-22 04:51:10,145 INFO L226 Difference]: Without dead ends: 834 [2020-12-22 04:51:10,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:51:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2020-12-22 04:51:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2020-12-22 04:51:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-12-22 04:51:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2020-12-22 04:51:10,339 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2020-12-22 04:51:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:10,339 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2020-12-22 04:51:10,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:51:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2020-12-22 04:51:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:10,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:10,340 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:10,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 04:51:10,541 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2020-12-22 04:51:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:10,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020474899] [2020-12-22 04:51:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:51:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020474899] [2020-12-22 04:51:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692999145] [2020-12-22 04:51:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:11,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:11,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:51:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:13,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:51:13,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:13,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2020-12-22 04:51:13,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428267269] [2020-12-22 04:51:13,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:51:13,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:51:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:51:13,478 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 47 states. [2020-12-22 04:51:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:18,768 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2020-12-22 04:51:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:51:18,770 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 42 [2020-12-22 04:51:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:18,774 INFO L225 Difference]: With dead ends: 1165 [2020-12-22 04:51:18,774 INFO L226 Difference]: Without dead ends: 1156 [2020-12-22 04:51:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=346, Invalid=5660, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:51:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-12-22 04:51:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2020-12-22 04:51:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-12-22 04:51:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2020-12-22 04:51:18,983 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2020-12-22 04:51:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:18,983 INFO L481 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2020-12-22 04:51:18,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:51:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2020-12-22 04:51:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:18,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:18,984 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:19,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:19,185 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2020-12-22 04:51:19,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:19,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969169144] [2020-12-22 04:51:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:51:20,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969169144] [2020-12-22 04:51:20,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778768351] [2020-12-22 04:51:20,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:20,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:51:20,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:51:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:21,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:51:21,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:21,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2020-12-22 04:51:21,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082765058] [2020-12-22 04:51:21,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:51:21,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:21,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:51:21,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1871, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:51:21,939 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand 45 states. [2020-12-22 04:51:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:26,677 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2020-12-22 04:51:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:51:26,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 42 [2020-12-22 04:51:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:26,682 INFO L225 Difference]: With dead ends: 983 [2020-12-22 04:51:26,682 INFO L226 Difference]: Without dead ends: 955 [2020-12-22 04:51:26,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=318, Invalid=4938, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:51:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-12-22 04:51:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2020-12-22 04:51:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-12-22 04:51:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2020-12-22 04:51:26,907 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2020-12-22 04:51:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:26,908 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2020-12-22 04:51:26,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:51:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2020-12-22 04:51:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:26,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:26,909 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:27,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:27,110 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2020-12-22 04:51:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:27,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656901995] [2020-12-22 04:51:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:51:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656901995] [2020-12-22 04:51:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104961755] [2020-12-22 04:51:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:28,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:51:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:51:28,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:29,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 04:51:29,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:29,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 43 [2020-12-22 04:51:29,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522279339] [2020-12-22 04:51:29,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:51:29,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:51:29,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:51:29,813 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand 43 states. [2020-12-22 04:51:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:33,638 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2020-12-22 04:51:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:51:33,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2020-12-22 04:51:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:33,643 INFO L225 Difference]: With dead ends: 853 [2020-12-22 04:51:33,643 INFO L226 Difference]: Without dead ends: 824 [2020-12-22 04:51:33,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:51:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2020-12-22 04:51:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2020-12-22 04:51:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-12-22 04:51:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2020-12-22 04:51:33,862 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2020-12-22 04:51:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:33,862 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2020-12-22 04:51:33,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:51:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2020-12-22 04:51:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:33,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:33,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:34,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:34,064 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2020-12-22 04:51:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:34,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888334685] [2020-12-22 04:51:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:51:35,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888334685] [2020-12-22 04:51:35,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874311165] [2020-12-22 04:51:35,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:51:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:36,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:51:36,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:36,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2020-12-22 04:51:36,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587514172] [2020-12-22 04:51:36,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:51:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:51:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:51:36,467 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand 41 states. [2020-12-22 04:51:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:39,766 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2020-12-22 04:51:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:51:39,767 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 42 [2020-12-22 04:51:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:39,770 INFO L225 Difference]: With dead ends: 754 [2020-12-22 04:51:39,770 INFO L226 Difference]: Without dead ends: 724 [2020-12-22 04:51:39,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=3854, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:51:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2020-12-22 04:51:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2020-12-22 04:51:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-12-22 04:51:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2020-12-22 04:51:39,992 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2020-12-22 04:51:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:39,992 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2020-12-22 04:51:39,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:51:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2020-12-22 04:51:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:39,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:39,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:40,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:40,201 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2020-12-22 04:51:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:40,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660122259] [2020-12-22 04:51:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 04:51:40,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660122259] [2020-12-22 04:51:40,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816338885] [2020-12-22 04:51:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:40,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:51:40,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:51:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 04:51:41,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:41,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2020-12-22 04:51:41,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025133564] [2020-12-22 04:51:41,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:51:41,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:51:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:51:41,531 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand 28 states. [2020-12-22 04:51:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:45,227 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2020-12-22 04:51:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:51:45,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 42 [2020-12-22 04:51:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:45,233 INFO L225 Difference]: With dead ends: 816 [2020-12-22 04:51:45,233 INFO L226 Difference]: Without dead ends: 753 [2020-12-22 04:51:45,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=748, Invalid=3034, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:51:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-12-22 04:51:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2020-12-22 04:51:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-12-22 04:51:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2020-12-22 04:51:45,471 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2020-12-22 04:51:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:45,471 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2020-12-22 04:51:45,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:51:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2020-12-22 04:51:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:45,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:45,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:45,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-22 04:51:45,673 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2020-12-22 04:51:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:45,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177348369] [2020-12-22 04:51:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 04:51:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177348369] [2020-12-22 04:51:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279518155] [2020-12-22 04:51:46,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:51:46,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:51:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:51:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:48,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:51:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 04:51:48,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:48,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2020-12-22 04:51:48,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805843673] [2020-12-22 04:51:48,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:51:48,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:51:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:51:48,305 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand 39 states. [2020-12-22 04:51:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:51,412 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2020-12-22 04:51:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:51:51,414 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-22 04:51:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:51,418 INFO L225 Difference]: With dead ends: 774 [2020-12-22 04:51:51,418 INFO L226 Difference]: Without dead ends: 743 [2020-12-22 04:51:51,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:51:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-12-22 04:51:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2020-12-22 04:51:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-12-22 04:51:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2020-12-22 04:51:51,683 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2020-12-22 04:51:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:51,684 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2020-12-22 04:51:51,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:51:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2020-12-22 04:51:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:51:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:51,685 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:51,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:51,888 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2020-12-22 04:51:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:51,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266489809] [2020-12-22 04:51:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 04:51:52,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266489809] [2020-12-22 04:51:52,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486950323] [2020-12-22 04:51:52,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:52,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:51:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:51:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 04:51:53,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:53,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2020-12-22 04:51:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505614810] [2020-12-22 04:51:53,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:51:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:51:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:51:53,450 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand 29 states. [2020-12-22 04:51:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:55,555 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2020-12-22 04:51:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:51:55,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2020-12-22 04:51:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:55,560 INFO L225 Difference]: With dead ends: 755 [2020-12-22 04:51:55,560 INFO L226 Difference]: Without dead ends: 721 [2020-12-22 04:51:55,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:51:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-22 04:51:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2020-12-22 04:51:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-12-22 04:51:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2020-12-22 04:51:55,824 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2020-12-22 04:51:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:55,824 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2020-12-22 04:51:55,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:51:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2020-12-22 04:51:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:51:55,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:55,826 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:51:56,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:56,027 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2020-12-22 04:51:56,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:56,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46549037] [2020-12-22 04:51:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:51:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46549037] [2020-12-22 04:51:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493460910] [2020-12-22 04:51:57,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:57,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:51:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:51:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:51:59,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:59,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2020-12-22 04:51:59,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342365864] [2020-12-22 04:51:59,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:51:59,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:51:59,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:51:59,543 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand 47 states. [2020-12-22 04:52:07,214 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-12-22 04:52:10,221 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2020-12-22 04:52:10,621 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-12-22 04:52:11,614 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2020-12-22 04:52:12,428 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-12-22 04:52:12,625 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 04:52:13,075 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 28 [2020-12-22 04:52:13,322 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-12-22 04:52:13,779 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2020-12-22 04:52:14,053 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-12-22 04:52:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:14,509 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2020-12-22 04:52:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-22 04:52:14,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 43 [2020-12-22 04:52:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:14,514 INFO L225 Difference]: With dead ends: 1173 [2020-12-22 04:52:14,514 INFO L226 Difference]: Without dead ends: 1125 [2020-12-22 04:52:14,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=3576, Invalid=16164, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 04:52:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-12-22 04:52:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2020-12-22 04:52:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-12-22 04:52:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2020-12-22 04:52:14,796 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2020-12-22 04:52:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:14,796 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2020-12-22 04:52:14,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:52:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2020-12-22 04:52:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:52:14,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:14,797 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:14,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:14,998 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2020-12-22 04:52:14,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:14,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236776687] [2020-12-22 04:52:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:52:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236776687] [2020-12-22 04:52:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847343582] [2020-12-22 04:52:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:16,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:52:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:52:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:52:19,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:19,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2020-12-22 04:52:19,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759683715] [2020-12-22 04:52:19,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:52:19,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:52:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:52:19,191 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand 48 states. [2020-12-22 04:52:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:24,377 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2020-12-22 04:52:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:52:24,380 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 43 [2020-12-22 04:52:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:24,382 INFO L225 Difference]: With dead ends: 1155 [2020-12-22 04:52:24,382 INFO L226 Difference]: Without dead ends: 1131 [2020-12-22 04:52:24,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:52:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-12-22 04:52:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2020-12-22 04:52:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-12-22 04:52:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2020-12-22 04:52:24,659 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2020-12-22 04:52:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:24,659 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2020-12-22 04:52:24,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:52:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2020-12-22 04:52:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:52:24,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:24,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:24,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:24,861 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2020-12-22 04:52:24,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:24,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771186219] [2020-12-22 04:52:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 04:52:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771186219] [2020-12-22 04:52:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715816169] [2020-12-22 04:52:25,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:25,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:52:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 04:52:25,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:25,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-22 04:52:25,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746004959] [2020-12-22 04:52:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:52:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:52:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:52:25,568 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand 22 states.