/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:51:38,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:51:38,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:51:38,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:51:38,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:51:38,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:51:38,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:51:38,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:51:38,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:51:38,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:51:38,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:51:38,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:51:38,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:51:38,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:51:38,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:51:38,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:51:38,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:51:38,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:51:38,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:51:38,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:51:38,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:51:38,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:51:38,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:51:38,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:51:38,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:51:38,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:51:38,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:51:38,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:51:38,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:51:38,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:51:38,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:51:38,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:51:38,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:51:38,947 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:51:38,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:51:38,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:51:38,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:51:38,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:51:38,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:51:38,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:51:38,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:51:38,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:51:38,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:51:38,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:51:38,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:51:38,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:51:38,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:38,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:51:38,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:51:38,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:51:38,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:51:38,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:51:38,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:51:38,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:51:38,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:51:39,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:51:39,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:51:39,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:51:39,379 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:51:39,380 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:51:39,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2020-12-23 06:51:39,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cada70d39/0c0c0312d4e242f98c7272f2d56af27d/FLAG38f2bc076 [2020-12-23 06:51:40,241 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:51:40,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2020-12-23 06:51:40,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cada70d39/0c0c0312d4e242f98c7272f2d56af27d/FLAG38f2bc076 [2020-12-23 06:51:40,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cada70d39/0c0c0312d4e242f98c7272f2d56af27d [2020-12-23 06:51:40,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:51:40,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:51:40,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:40,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:51:40,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:51:40,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc1da47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40, skipping insertion in model container [2020-12-23 06:51:40,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:51:40,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:51:40,789 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2020-12-23 06:51:40,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:40,814 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:51:40,829 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2020-12-23 06:51:40,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:51:40,856 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:51:40,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40 WrapperNode [2020-12-23 06:51:40,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:51:40,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:40,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:51:40,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:51:40,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:51:40,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:51:40,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:51:40,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:51:40,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... [2020-12-23 06:51:40,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:51:40,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:51:40,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:51:40,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:51:40,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:51:41,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:51:41,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:51:41,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:51:41,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:51:41,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:51:41,324 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:51:41,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:41 BoogieIcfgContainer [2020-12-23 06:51:41,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:51:41,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:51:41,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:51:41,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:51:41,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:51:40" (1/3) ... [2020-12-23 06:51:41,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e64cde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:41, skipping insertion in model container [2020-12-23 06:51:41,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:51:40" (2/3) ... [2020-12-23 06:51:41,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e64cde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:51:41, skipping insertion in model container [2020-12-23 06:51:41,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:51:41" (3/3) ... [2020-12-23 06:51:41,338 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2020-12-23 06:51:41,349 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:51:41,355 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:51:41,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:51:41,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:51:41,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:51:41,489 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:51:41,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:51:41,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:51:41,489 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:51:41,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:51:41,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:51:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-23 06:51:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:41,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:41,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:41,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-23 06:51:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:41,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054428189] [2020-12-23 06:51:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:41,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054428189] [2020-12-23 06:51:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:41,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:51:41,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127106729] [2020-12-23 06:51:41,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:51:41,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:41,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:51:41,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:51:41,750 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-23 06:51:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:41,767 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-23 06:51:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:51:41,768 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:51:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:41,779 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:41,779 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:51:41,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:51:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:51:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:51:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:51:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-23 06:51:41,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-23 06:51:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:41,823 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-23 06:51:41,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:51:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-23 06:51:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:51:41,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:41,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:51:41,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:51:41,825 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-23 06:51:41,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:41,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772965106] [2020-12-23 06:51:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772965106] [2020-12-23 06:51:41,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:51:41,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:51:41,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292654411] [2020-12-23 06:51:41,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:41,930 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-23 06:51:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:41,971 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-23 06:51:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:41,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:51:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:41,973 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:51:41,974 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:51:41,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:51:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:51:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:51:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:51:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:51:41,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 06:51:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:41,981 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:51:41,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:51:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:51:41,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:41,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:41,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:51:41,982 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-23 06:51:41,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:41,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756777341] [2020-12-23 06:51:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756777341] [2020-12-23 06:51:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110065561] [2020-12-23 06:51:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:51:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:51:42,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208485655] [2020-12-23 06:51:42,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:51:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:51:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:42,318 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 06:51:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:42,385 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 06:51:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:51:42,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:51:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:42,387 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:51:42,387 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:51:42,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:51:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:51:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:51:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:51:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:51:42,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 06:51:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:42,392 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:51:42,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:51:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:51:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:51:42,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:42,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:42,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:51:42,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:42,610 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-23 06:51:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:42,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132270746] [2020-12-23 06:51:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132270746] [2020-12-23 06:51:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881022619] [2020-12-23 06:51:42,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:42,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:42,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:42,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:51:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:42,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:42,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:51:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209140297] [2020-12-23 06:51:42,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:51:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:51:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:51:42,889 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-23 06:51:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:42,952 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-23 06:51:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:51:42,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 06:51:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:42,954 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:51:42,954 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:51:42,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:51:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:51:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:51:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:51:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:51:42,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-23 06:51:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:42,960 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:51:42,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:51:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:51:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:51:42,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:42,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:43,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:43,176 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-23 06:51:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:43,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615585012] [2020-12-23 06:51:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:43,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615585012] [2020-12-23 06:51:43,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714082263] [2020-12-23 06:51:43,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:43,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 06:51:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:51:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:51:43,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:51:43,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-23 06:51:43,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340862906] [2020-12-23 06:51:43,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:51:43,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:51:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:43,430 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-23 06:51:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:43,450 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-23 06:51:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:51:43,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 06:51:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:43,451 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:51:43,452 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:51:43,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:51:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 06:51:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:51:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 06:51:43,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-23 06:51:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:43,457 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 06:51:43,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:51:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 06:51:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:51:43,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:43,458 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:43,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:43,675 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:43,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-23 06:51:43,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:43,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661779560] [2020-12-23 06:51:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:43,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661779560] [2020-12-23 06:51:43,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472456483] [2020-12-23 06:51:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:51:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:43,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:43,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:51:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286607642] [2020-12-23 06:51:43,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:51:43,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:51:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:43,931 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 06:51:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:43,982 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 06:51:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:51:43,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 06:51:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:43,984 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:51:43,984 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:51:43,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:51:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:51:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:51:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:51:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 06:51:43,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-23 06:51:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:43,989 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 06:51:43,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:51:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 06:51:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:51:43,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:43,990 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:44,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:44,196 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-23 06:51:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578417050] [2020-12-23 06:51:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578417050] [2020-12-23 06:51:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394387978] [2020-12-23 06:51:44,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:44,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:44,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:51:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:44,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:44,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-23 06:51:44,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501669099] [2020-12-23 06:51:44,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:51:44,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:51:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:44,417 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-23 06:51:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:44,500 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 06:51:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:51:44,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:51:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:44,501 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:51:44,501 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:51:44,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:51:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:51:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:51:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:51:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 06:51:44,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-23 06:51:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:44,507 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 06:51:44,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:51:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 06:51:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:51:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:44,508 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:44,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:51:44,722 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-23 06:51:44,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:44,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417643532] [2020-12-23 06:51:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:44,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417643532] [2020-12-23 06:51:44,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231460001] [2020-12-23 06:51:44,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:44,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:51:44,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:51:44,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 06:51:45,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:45,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-23 06:51:45,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19576022] [2020-12-23 06:51:45,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:45,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:45,034 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-23 06:51:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:45,244 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 06:51:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:51:45,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:51:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:45,245 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:51:45,245 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:51:45,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:51:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:51:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-23 06:51:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:51:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 06:51:45,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-23 06:51:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:45,252 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 06:51:45,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 06:51:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:51:45,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:45,253 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:45,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:45,468 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-23 06:51:45,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:45,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440313429] [2020-12-23 06:51:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:45,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440313429] [2020-12-23 06:51:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314811991] [2020-12-23 06:51:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:45,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:51:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:45,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:51:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495446291] [2020-12-23 06:51:45,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:51:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:51:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:45,750 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-23 06:51:45,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:45,858 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 06:51:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:51:45,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 06:51:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:45,859 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:51:45,859 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:51:45,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:51:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:51:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:51:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:51:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-23 06:51:45,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-23 06:51:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:45,865 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-23 06:51:45,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:51:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-23 06:51:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:51:45,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:45,866 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:46,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:46,080 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-23 06:51:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:46,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317536675] [2020-12-23 06:51:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:46,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317536675] [2020-12-23 06:51:46,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331521260] [2020-12-23 06:51:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:46,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:51:46,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:51:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:46,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:46,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:51:46,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572141169] [2020-12-23 06:51:46,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:51:46,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:46,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:51:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:46,538 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-23 06:51:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:46,667 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 06:51:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:51:46,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-23 06:51:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:46,669 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:51:46,669 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:51:46,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:51:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:51:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:51:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:51:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-23 06:51:46,675 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-23 06:51:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:46,675 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-23 06:51:46,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:51:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-23 06:51:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:51:46,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:46,676 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:46,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:51:46,882 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-23 06:51:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:46,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855008163] [2020-12-23 06:51:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:47,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855008163] [2020-12-23 06:51:47,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998830610] [2020-12-23 06:51:47,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:47,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 06:51:47,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:51:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:47,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:47,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2020-12-23 06:51:47,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261300185] [2020-12-23 06:51:47,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:51:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:51:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:51:47,379 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-12-23 06:51:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:47,546 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 06:51:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:51:47,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 06:51:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:47,548 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:51:47,548 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:51:47,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:51:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:51:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:51:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:51:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 06:51:47,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-12-23 06:51:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:47,554 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 06:51:47,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:51:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 06:51:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:51:47,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:47,555 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:47,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:47,762 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-23 06:51:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:47,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477258634] [2020-12-23 06:51:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:48,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477258634] [2020-12-23 06:51:48,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560747245] [2020-12-23 06:51:48,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:51:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:48,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:48,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:51:48,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094443420] [2020-12-23 06:51:48,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:51:48,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:51:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:48,169 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2020-12-23 06:51:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:48,359 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-23 06:51:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:51:48,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-23 06:51:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:48,367 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:51:48,367 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:51:48,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:51:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:51:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:51:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:51:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-23 06:51:48,373 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-23 06:51:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:48,373 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-23 06:51:48,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:51:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-23 06:51:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:51:48,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:48,374 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:48,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:48,587 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-23 06:51:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:48,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738217730] [2020-12-23 06:51:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:48,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738217730] [2020-12-23 06:51:48,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631789019] [2020-12-23 06:51:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:48,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:51:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:49,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:49,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-23 06:51:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575675465] [2020-12-23 06:51:49,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:51:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:49,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:51:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:49,023 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2020-12-23 06:51:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:49,269 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-23 06:51:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:51:49,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 06:51:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:49,275 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:51:49,276 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:51:49,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:51:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:51:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:51:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 06:51:49,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-23 06:51:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:49,299 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 06:51:49,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:51:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 06:51:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:51:49,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:49,301 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:49,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:51:49,515 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-23 06:51:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720864541] [2020-12-23 06:51:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:51:49,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720864541] [2020-12-23 06:51:49,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033632618] [2020-12-23 06:51:49,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:49,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:51:49,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:51:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 06:51:49,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:49,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-23 06:51:49,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316970424] [2020-12-23 06:51:49,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:51:49,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:51:49,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:49,938 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2020-12-23 06:51:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:50,381 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-23 06:51:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:51:50,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-23 06:51:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:50,384 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:51:50,384 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:51:50,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:51:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:51:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-23 06:51:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:51:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 06:51:50,391 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-12-23 06:51:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:50,392 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 06:51:50,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:51:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 06:51:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:51:50,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:50,393 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:50,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:51:50,606 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-23 06:51:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:50,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328162193] [2020-12-23 06:51:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:51:50,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328162193] [2020-12-23 06:51:50,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57189794] [2020-12-23 06:51:50,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:50,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:50,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:50,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:51:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:51:51,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:51,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:51:51,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312391301] [2020-12-23 06:51:51,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:51:51,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:51:51,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:51,122 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 16 states. [2020-12-23 06:51:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:51,385 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-23 06:51:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:51:51,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-23 06:51:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:51,387 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:51:51,387 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:51:51,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:51:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:51:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 06:51:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:51:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 06:51:51,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2020-12-23 06:51:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:51,394 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 06:51:51,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:51:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 06:51:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:51:51,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:51,395 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:51,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:51:51,611 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-23 06:51:51,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:51,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278988826] [2020-12-23 06:51:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:51:51,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278988826] [2020-12-23 06:51:51,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330601254] [2020-12-23 06:51:51,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:52,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 06:51:52,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:51:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:51:52,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:52,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:51:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844727379] [2020-12-23 06:51:52,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:51:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:51:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:52,469 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 17 states. [2020-12-23 06:51:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:52,792 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-23 06:51:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:51:52,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-23 06:51:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:52,794 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:51:52,794 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:51:52,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:51:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:51:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:51:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:51:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-23 06:51:52,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2020-12-23 06:51:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:52,801 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-23 06:51:52,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:51:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-23 06:51:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:51:52,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:52,802 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:53,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:53,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-23 06:51:53,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:53,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748322490] [2020-12-23 06:51:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:51:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748322490] [2020-12-23 06:51:53,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594658876] [2020-12-23 06:51:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:53,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 06:51:53,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:51:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 06:51:53,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:53,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-12-23 06:51:53,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099770913] [2020-12-23 06:51:53,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:51:53,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:51:53,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:51:53,839 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 21 states. [2020-12-23 06:51:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:54,554 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-23 06:51:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:51:54,555 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-23 06:51:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:54,556 INFO L225 Difference]: With dead ends: 59 [2020-12-23 06:51:54,556 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:51:54,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:51:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:51:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-23 06:51:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:51:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 06:51:54,562 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-23 06:51:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:54,563 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 06:51:54,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:51:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 06:51:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:51:54,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:54,564 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:54,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:51:54,772 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-23 06:51:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:54,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981413700] [2020-12-23 06:51:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:51:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981413700] [2020-12-23 06:51:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564218173] [2020-12-23 06:51:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:51:55,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:51:55,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:55,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:51:55,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122095004] [2020-12-23 06:51:55,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:51:55,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:51:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:51:55,268 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-23 06:51:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:55,642 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-23 06:51:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:51:55,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-23 06:51:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:55,643 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:51:55,643 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:51:55,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:51:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:51:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 06:51:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:51:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-23 06:51:55,649 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-23 06:51:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:55,649 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-23 06:51:55,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:51:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-23 06:51:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:51:55,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:55,650 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:55,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:51:55,866 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-23 06:51:55,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:55,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750144673] [2020-12-23 06:51:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:51:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750144673] [2020-12-23 06:51:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783855749] [2020-12-23 06:51:56,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:56,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:51:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:51:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:51:56,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:56,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-23 06:51:56,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620527192] [2020-12-23 06:51:56,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:51:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:51:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:51:56,522 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-23 06:51:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:57,100 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-23 06:51:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:51:57,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-23 06:51:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:57,102 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:51:57,102 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:51:57,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:51:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:51:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 06:51:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:51:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-23 06:51:57,109 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-23 06:51:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-23 06:51:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:51:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-23 06:51:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:51:57,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:57,110 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:57,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:57,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-23 06:51:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:57,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085621735] [2020-12-23 06:51:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 06:51:57,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085621735] [2020-12-23 06:51:57,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522185877] [2020-12-23 06:51:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:57,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:51:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:51:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-23 06:51:58,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:58,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-23 06:51:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284233617] [2020-12-23 06:51:58,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:51:58,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:51:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:51:58,051 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-23 06:51:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:51:59,076 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-23 06:51:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:51:59,076 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-23 06:51:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:51:59,077 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:51:59,077 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:51:59,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:51:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:51:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-12-23 06:51:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:51:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-23 06:51:59,082 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-12-23 06:51:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:51:59,083 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-23 06:51:59,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:51:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-23 06:51:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:51:59,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:51:59,083 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:51:59,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:59,284 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:51:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:51:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-23 06:51:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:51:59,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508386764] [2020-12-23 06:51:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:51:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:51:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:51:59,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508386764] [2020-12-23 06:51:59,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912241871] [2020-12-23 06:51:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:51:59,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:51:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:51:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:51:59,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:51:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:51:59,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:51:59,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:51:59,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149288392] [2020-12-23 06:51:59,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:51:59,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:51:59,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:51:59,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:51:59,999 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-12-23 06:52:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:00,562 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-12-23 06:52:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:52:00,563 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-23 06:52:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:00,564 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:52:00,564 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 06:52:00,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:52:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 06:52:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 06:52:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:52:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-23 06:52:00,570 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-12-23 06:52:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:00,570 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-23 06:52:00,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:52:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-23 06:52:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:52:00,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:00,571 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:00,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:00,778 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-23 06:52:00,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:00,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001983667] [2020-12-23 06:52:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:52:01,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001983667] [2020-12-23 06:52:01,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937158335] [2020-12-23 06:52:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:02,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 06:52:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:02,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:52:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:52:02,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:02,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:52:02,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66460714] [2020-12-23 06:52:02,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:52:02,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:02,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:52:02,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:52:02,915 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2020-12-23 06:52:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:03,582 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-23 06:52:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:52:03,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-23 06:52:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:03,587 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:52:03,587 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 06:52:03,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:52:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 06:52:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 06:52:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:52:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-23 06:52:03,592 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-12-23 06:52:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:03,593 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-23 06:52:03,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:52:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-23 06:52:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:52:03,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:03,594 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:03,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:52:03,801 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:03,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-23 06:52:03,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:03,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434365692] [2020-12-23 06:52:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 06:52:04,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434365692] [2020-12-23 06:52:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343063268] [2020-12-23 06:52:04,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:05,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 06:52:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:52:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 25 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-23 06:52:06,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:06,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 06:52:06,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878997657] [2020-12-23 06:52:06,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:52:06,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:52:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:06,048 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-12-23 06:52:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:07,535 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-12-23 06:52:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:52:07,536 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-23 06:52:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:07,536 INFO L225 Difference]: With dead ends: 77 [2020-12-23 06:52:07,537 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:52:07,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:52:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:52:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 06:52:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:52:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-23 06:52:07,542 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-12-23 06:52:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:07,542 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-23 06:52:07,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:52:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-23 06:52:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:52:07,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:07,543 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:07,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:52:07,744 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2020-12-23 06:52:07,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:07,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723346832] [2020-12-23 06:52:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:52:08,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723346832] [2020-12-23 06:52:08,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311940194] [2020-12-23 06:52:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:52:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:52:08,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:08,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:52:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140410408] [2020-12-23 06:52:08,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:52:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:52:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:52:08,575 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-12-23 06:52:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:09,290 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-23 06:52:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:52:09,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-23 06:52:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:09,292 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:52:09,292 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:52:09,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:52:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:52:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 06:52:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:52:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-23 06:52:09,298 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-12-23 06:52:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:09,298 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-23 06:52:09,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:52:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-23 06:52:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:52:09,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:09,299 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:09,508 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2020-12-23 06:52:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:09,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512799813] [2020-12-23 06:52:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:52:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512799813] [2020-12-23 06:52:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395691359] [2020-12-23 06:52:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:10,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:52:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:10,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:10,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2020-12-23 06:52:10,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848271929] [2020-12-23 06:52:10,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:52:10,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:52:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:52:10,630 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-12-23 06:52:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:11,745 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-23 06:52:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:52:11,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 06:52:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:11,746 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:52:11,746 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:52:11,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:52:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:52:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 06:52:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 06:52:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-23 06:52:11,752 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-12-23 06:52:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:11,752 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-23 06:52:11,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:52:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-23 06:52:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:52:11,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:11,753 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:11,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:52:11,967 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2020-12-23 06:52:11,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:11,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316933340] [2020-12-23 06:52:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 06:52:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316933340] [2020-12-23 06:52:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064123777] [2020-12-23 06:52:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:12,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 06:52:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:52:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-23 06:52:13,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:13,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-23 06:52:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346275784] [2020-12-23 06:52:13,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:52:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:52:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:52:13,928 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2020-12-23 06:52:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:16,543 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-23 06:52:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:52:16,544 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-23 06:52:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:16,544 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:52:16,544 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:52:16,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:52:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:52:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-23 06:52:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 06:52:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-23 06:52:16,550 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2020-12-23 06:52:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:16,550 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-23 06:52:16,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:52:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-23 06:52:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:52:16,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:16,551 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:16,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:16,755 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2020-12-23 06:52:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34601618] [2020-12-23 06:52:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:52:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34601618] [2020-12-23 06:52:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741743427] [2020-12-23 06:52:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:17,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:17,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:17,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:52:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:52:17,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:17,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:52:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498528468] [2020-12-23 06:52:17,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:52:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:52:17,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:52:17,719 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-12-23 06:52:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:18,744 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-23 06:52:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:52:18,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-12-23 06:52:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:18,745 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:52:18,745 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:52:18,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:52:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:52:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 06:52:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:52:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-23 06:52:18,754 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-12-23 06:52:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:18,755 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-23 06:52:18,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:52:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-23 06:52:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:52:18,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:18,756 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:18,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:52:18,970 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2020-12-23 06:52:18,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:18,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730759636] [2020-12-23 06:52:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:52:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730759636] [2020-12-23 06:52:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543090552] [2020-12-23 06:52:19,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:23,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 06:52:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:52:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:52:24,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:24,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:52:24,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433273299] [2020-12-23 06:52:24,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:52:24,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:24,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:52:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:24,356 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-12-23 06:52:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:25,410 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-23 06:52:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:52:25,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-23 06:52:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:25,414 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:52:25,415 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:52:25,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:52:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:52:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 06:52:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 06:52:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-23 06:52:25,419 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-23 06:52:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:25,419 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-23 06:52:25,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:52:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-23 06:52:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:52:25,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:25,420 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:25,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:52:25,621 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2020-12-23 06:52:25,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:25,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247169304] [2020-12-23 06:52:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 06:52:26,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247169304] [2020-12-23 06:52:26,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99936958] [2020-12-23 06:52:26,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:27,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:52:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:52:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 555 proven. 322 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-23 06:52:31,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:31,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 47 [2020-12-23 06:52:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844468065] [2020-12-23 06:52:31,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:52:31,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:52:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:52:31,294 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 47 states. [2020-12-23 06:52:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:33,632 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-12-23 06:52:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:52:33,633 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-12-23 06:52:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:33,634 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:52:33,634 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:52:33,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:52:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:52:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-12-23 06:52:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 06:52:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-23 06:52:33,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2020-12-23 06:52:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:33,641 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-23 06:52:33,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:52:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-23 06:52:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:52:33,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:33,643 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:33,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:52:33,848 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-23 06:52:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:33,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258220630] [2020-12-23 06:52:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 06:52:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258220630] [2020-12-23 06:52:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234454636] [2020-12-23 06:52:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:52:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 06:52:34,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:34,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:52:34,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639220410] [2020-12-23 06:52:34,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:52:34,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:52:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:52:34,927 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-23 06:52:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:36,255 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-23 06:52:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:52:36,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-23 06:52:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:36,256 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:52:36,256 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:52:36,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:52:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:52:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 06:52:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 06:52:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-23 06:52:36,263 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-23 06:52:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:36,263 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-23 06:52:36,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:52:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-23 06:52:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:52:36,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:36,266 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:36,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:36,482 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-23 06:52:36,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:36,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763304776] [2020-12-23 06:52:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 06:52:37,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763304776] [2020-12-23 06:52:37,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269626910] [2020-12-23 06:52:37,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:37,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:37,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:52:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:38,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:38,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-23 06:52:38,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927367226] [2020-12-23 06:52:38,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:52:38,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:38,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:52:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:52:38,087 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-23 06:52:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:39,927 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-23 06:52:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:52:39,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-23 06:52:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:39,930 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:52:39,930 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:52:39,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:52:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:52:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 06:52:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 06:52:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-23 06:52:39,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-23 06:52:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:39,936 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-23 06:52:39,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:52:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-23 06:52:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:52:39,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:39,937 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:40,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 06:52:40,150 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-23 06:52:40,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:40,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151095210] [2020-12-23 06:52:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 06:52:41,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151095210] [2020-12-23 06:52:41,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110157115] [2020-12-23 06:52:41,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:41,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:52:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:52:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 357 proven. 592 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-23 06:52:44,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:44,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 41 [2020-12-23 06:52:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214183234] [2020-12-23 06:52:44,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:52:44,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:52:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:52:44,059 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-23 06:52:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:47,775 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-23 06:52:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:52:47,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-23 06:52:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:47,779 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:52:47,779 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:52:47,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:52:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:52:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 06:52:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 06:52:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-23 06:52:47,789 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-23 06:52:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:47,789 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-23 06:52:47,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:52:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-23 06:52:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:52:47,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:47,790 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:47,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:47,991 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-23 06:52:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:47,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242058590] [2020-12-23 06:52:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 06:52:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242058590] [2020-12-23 06:52:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005537253] [2020-12-23 06:52:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:49,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:49,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:52:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 06:52:49,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:49,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:52:49,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275261908] [2020-12-23 06:52:49,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:52:49,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:49,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:52:49,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:52:49,360 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-23 06:52:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:51,026 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-23 06:52:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:52:51,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-23 06:52:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:51,028 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:52:51,028 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:52:51,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:52:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:52:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-23 06:52:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 06:52:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-23 06:52:51,034 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-23 06:52:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:51,035 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-23 06:52:51,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:52:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-23 06:52:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:52:51,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:51,036 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:51,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:52:51,238 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-23 06:52:51,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:51,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583129140] [2020-12-23 06:52:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 06:52:52,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583129140] [2020-12-23 06:52:52,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291018067] [2020-12-23 06:52:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:05,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-23 06:53:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-23 06:53:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 06:53:06,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:53:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314988172] [2020-12-23 06:53:06,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:53:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:53:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:53:06,765 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 35 states. [2020-12-23 06:53:08,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:08,515 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-23 06:53:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:53:08,515 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-12-23 06:53:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:08,516 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:53:08,517 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:53:08,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 27 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:53:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:53:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-23 06:53:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 06:53:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-23 06:53:08,523 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-23 06:53:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:08,523 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-23 06:53:08,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:53:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-23 06:53:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:53:08,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:08,524 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:53:08,724 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-23 06:53:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:08,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69833188] [2020-12-23 06:53:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 06:53:09,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69833188] [2020-12-23 06:53:09,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768863161] [2020-12-23 06:53:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:14,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-23 06:53:14,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:14,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-23 06:53:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 610 proven. 931 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 06:53:19,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:19,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29] total 57 [2020-12-23 06:53:19,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700285977] [2020-12-23 06:53:19,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:53:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:19,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:53:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2646, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:53:19,425 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 57 states. [2020-12-23 06:53:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:23,050 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2020-12-23 06:53:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:53:23,051 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 88 [2020-12-23 06:53:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:23,052 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:53:23,052 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:53:23,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=581, Invalid=2725, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:53:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:53:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-23 06:53:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 06:53:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-23 06:53:23,059 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2020-12-23 06:53:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:23,060 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-23 06:53:23,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:53:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-23 06:53:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:53:23,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:23,061 INFO L422 BasicCegarLoop]: trace histogram [43, 33, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:23,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:53:23,264 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:23,264 INFO L82 PathProgramCache]: Analyzing trace with hash 533862566, now seen corresponding path program 31 times [2020-12-23 06:53:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:23,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122416530] [2020-12-23 06:53:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 06:53:24,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122416530] [2020-12-23 06:53:24,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126814104] [2020-12-23 06:53:24,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:53:24,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 06:53:24,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:24,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:53:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167809273] [2020-12-23 06:53:24,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:53:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:53:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:53:24,981 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 37 states. [2020-12-23 06:53:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:27,066 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-23 06:53:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:53:27,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2020-12-23 06:53:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:27,068 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:53:27,068 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:53:27,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:53:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:53:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-23 06:53:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:53:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-23 06:53:27,077 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2020-12-23 06:53:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:27,077 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-23 06:53:27,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:53:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-23 06:53:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:53:27,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:27,078 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:27,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:53:27,294 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 32 times [2020-12-23 06:53:27,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:27,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588477623] [2020-12-23 06:53:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 06:53:28,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588477623] [2020-12-23 06:53:28,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125186376] [2020-12-23 06:53:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:28,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:53:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 06:53:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:29,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:29,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 48 [2020-12-23 06:53:29,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992005739] [2020-12-23 06:53:29,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:53:29,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:53:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:53:29,616 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2020-12-23 06:53:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:32,353 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-23 06:53:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:53:32,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-23 06:53:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:32,358 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:53:32,358 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:53:32,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:53:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:53:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-23 06:53:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 06:53:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-23 06:53:32,365 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 94 [2020-12-23 06:53:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:32,365 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-23 06:53:32,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:53:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-23 06:53:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:53:32,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:32,366 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:32,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:53:32,567 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 33 times [2020-12-23 06:53:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:32,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669833753] [2020-12-23 06:53:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 06:53:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669833753] [2020-12-23 06:53:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115224106] [2020-12-23 06:53:34,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:34,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:53:34,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:53:34,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 100 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-23 06:53:38,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:38,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2020-12-23 06:53:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423925628] [2020-12-23 06:53:38,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:53:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:38,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:53:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:53:38,019 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2020-12-23 06:53:45,004 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 06:53:46,129 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-23 06:53:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:48,486 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 06:53:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:53:48,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-23 06:53:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:48,488 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:53:48,488 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 06:53:48,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=378, Invalid=3162, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:53:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 06:53:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-12-23 06:53:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 06:53:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-23 06:53:48,495 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2020-12-23 06:53:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:48,495 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-23 06:53:48,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:53:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-23 06:53:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:53:48,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:48,496 INFO L422 BasicCegarLoop]: trace histogram [47, 36, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:48,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:53:48,697 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1698225740, now seen corresponding path program 34 times [2020-12-23 06:53:48,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:48,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381866236] [2020-12-23 06:53:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 06:53:50,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381866236] [2020-12-23 06:53:50,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093535403] [2020-12-23 06:53:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:50,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:53:50,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:53:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 06:53:50,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:50,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:53:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579128653] [2020-12-23 06:53:50,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:53:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:53:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:53:50,641 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 40 states. [2020-12-23 06:53:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:53,153 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-12-23 06:53:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:53:53,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 100 [2020-12-23 06:53:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:53,155 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:53:53,155 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 06:53:53,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:53:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 06:53:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-23 06:53:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 06:53:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-23 06:53:53,165 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 100 [2020-12-23 06:53:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:53,165 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-23 06:53:53,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:53:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-23 06:53:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:53:53,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:53,165 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:53,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:53:53,366 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 35 times [2020-12-23 06:53:53,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:53,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325215896] [2020-12-23 06:53:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 06:53:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325215896] [2020-12-23 06:53:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384924861] [2020-12-23 06:53:55,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:46,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-23 06:54:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-23 06:54:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 06:54:48,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:48,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:54:48,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152556808] [2020-12-23 06:54:48,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:54:48,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:54:48,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:54:48,874 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 41 states. [2020-12-23 06:54:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:51,591 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-12-23 06:54:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:54:51,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2020-12-23 06:54:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:51,594 INFO L225 Difference]: With dead ends: 134 [2020-12-23 06:54:51,594 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:54:51,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:54:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:54:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-23 06:54:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 06:54:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-23 06:54:51,603 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-23 06:54:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:51,604 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-23 06:54:51,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:54:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-23 06:54:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:54:51,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:51,605 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:51,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:54:51,811 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 36 times [2020-12-23 06:54:51,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:51,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32896396] [2020-12-23 06:54:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 06:54:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32896396] [2020-12-23 06:54:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230842641] [2020-12-23 06:54:53,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:02,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-12-23 06:55:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:02,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 122 conjunts are in the unsatisfiable core [2020-12-23 06:55:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 870 proven. 1397 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-23 06:55:11,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:11,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 70 [2020-12-23 06:55:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125897289] [2020-12-23 06:55:11,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:55:11,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:55:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=3938, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:55:11,975 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 70 states. [2020-12-23 06:55:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:20,882 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2020-12-23 06:55:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:55:20,884 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 104 [2020-12-23 06:55:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:20,885 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:55:20,885 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 06:55:20,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=974, Invalid=5506, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:55:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 06:55:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2020-12-23 06:55:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 06:55:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-23 06:55:20,895 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-12-23 06:55:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:20,895 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-23 06:55:20,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:55:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-23 06:55:20,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:55:20,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:20,896 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:21,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:21,101 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-23 06:55:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:21,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717050649] [2020-12-23 06:55:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 06:55:23,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717050649] [2020-12-23 06:55:23,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17025008] [2020-12-23 06:55:23,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:55:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 06:55:23,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:23,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:55:23,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880967539] [2020-12-23 06:55:23,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:55:23,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:55:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:55:23,612 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-23 06:55:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:27,085 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-23 06:55:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:55:27,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-23 06:55:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:27,088 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:55:27,088 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 06:55:27,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:55:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 06:55:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-23 06:55:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 06:55:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-23 06:55:27,095 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-23 06:55:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:27,095 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-23 06:55:27,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:55:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-23 06:55:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:55:27,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:27,096 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:27,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:27,306 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-23 06:55:27,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:27,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986165925] [2020-12-23 06:55:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 06:55:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986165925] [2020-12-23 06:55:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358085356] [2020-12-23 06:55:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 06:55:29,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-23 06:55:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:31,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-23 06:55:31,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797631225] [2020-12-23 06:55:31,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:55:31,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:55:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:31,034 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2020-12-23 06:55:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:35,953 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-12-23 06:55:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:55:35,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-23 06:55:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:35,956 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:55:35,956 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:55:35,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:55:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-23 06:55:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 06:55:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-23 06:55:35,967 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2020-12-23 06:55:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:35,968 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-23 06:55:35,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:55:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-23 06:55:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:55:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:35,969 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:36,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 06:55:36,182 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2020-12-23 06:55:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:36,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062160784] [2020-12-23 06:55:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-23 06:55:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062160784] [2020-12-23 06:55:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159848337] [2020-12-23 06:55:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 06:55:39,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-23 06:55:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:55:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-23 06:55:45,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:45,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-23 06:55:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234337326] [2020-12-23 06:55:45,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:55:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:55:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:55:45,297 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2020-12-23 06:55:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:55,790 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-12-23 06:55:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:55:55,791 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-23 06:55:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:55,792 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:55:55,792 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:55:55,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:55:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:55:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-23 06:55:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 06:55:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-12-23 06:55:55,802 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2020-12-23 06:55:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:55,802 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-12-23 06:55:55,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:55:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-12-23 06:55:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:55:55,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:55,803 INFO L422 BasicCegarLoop]: trace histogram [55, 42, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:56,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:56,004 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash -675248560, now seen corresponding path program 40 times [2020-12-23 06:55:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908224628] [2020-12-23 06:55:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat