/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/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:25:05,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:25:05,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:25:05,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:25:05,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:25:05,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:25:05,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:25:05,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:25:05,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:25:05,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:25:05,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:25:05,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:25:05,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:25:05,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:25:05,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:25:05,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:25:05,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:25:05,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:25:05,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:25:05,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:25:05,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:25:05,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:25:05,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:25:05,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:25:05,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:25:05,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:25:05,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:25:05,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:25:05,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:25:06,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:25:06,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:25:06,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:25:06,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:25:06,066 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:25:06,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:25:06,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:25:06,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:25:06,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:25:06,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:25:06,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:25:06,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:25:06,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:25:06,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:25:06,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:25:06,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:25:06,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:25:06,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:25:06,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:25:06,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:25:06,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:25:06,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:25:06,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:25:06,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:25:06,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:25:06,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:25:06,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:25:06,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:25:06,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:25:06,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:25:06,640 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:25:06,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2020-12-21 22:25:06,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1932a8c/b2af5008a4a94686aeb8edea3160b802/FLAGce69763fa [2020-12-21 22:25:07,469 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:25:07,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2020-12-21 22:25:07,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1932a8c/b2af5008a4a94686aeb8edea3160b802/FLAGce69763fa [2020-12-21 22:25:07,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c1932a8c/b2af5008a4a94686aeb8edea3160b802 [2020-12-21 22:25:07,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:25:07,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:25:07,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:25:07,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:25:07,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:25:07,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:25:07" (1/1) ... [2020-12-21 22:25:07,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5486b17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:07, skipping insertion in model container [2020-12-21 22:25:07,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:25:07" (1/1) ... [2020-12-21 22:25:07,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:25:07,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:25:08,020 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2020-12-21 22:25:08,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:25:08,052 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:25:08,067 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2020-12-21 22:25:08,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:25:08,096 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:25:08,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08 WrapperNode [2020-12-21 22:25:08,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:25:08,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:25:08,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:25:08,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:25:08,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:25:08,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:25:08,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:25:08,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:25:08,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... [2020-12-21 22:25:08,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:25:08,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:25:08,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:25:08,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:25:08,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:25:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:25:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:25:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:25:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:25:08,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:25:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:25:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:25:08,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:25:08,577 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 22:25:08,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:25:08 BoogieIcfgContainer [2020-12-21 22:25:08,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:25:08,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:25:08,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:25:08,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:25:08,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:25:07" (1/3) ... [2020-12-21 22:25:08,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8a1e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:25:08, skipping insertion in model container [2020-12-21 22:25:08,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:25:08" (2/3) ... [2020-12-21 22:25:08,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8a1e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:25:08, skipping insertion in model container [2020-12-21 22:25:08,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:25:08" (3/3) ... [2020-12-21 22:25:08,600 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2020-12-21 22:25:08,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:25:08,638 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:25:08,695 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:25:08,722 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:25:08,723 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:25:08,723 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:25:08,723 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:25:08,723 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:25:08,723 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:25:08,723 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:25:08,724 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:25:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-21 22:25:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:25:08,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:08,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:08,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2020-12-21 22:25:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:08,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677513282] [2020-12-21 22:25:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677513282] [2020-12-21 22:25:08,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:08,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:25:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271515727] [2020-12-21 22:25:08,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:25:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:08,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:25:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:25:08,969 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-21 22:25:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:08,994 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2020-12-21 22:25:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:25:08,996 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-21 22:25:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:09,008 INFO L225 Difference]: With dead ends: 47 [2020-12-21 22:25:09,009 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 22:25:09,013 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 [2020-12-21 22:25:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 22:25:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-21 22:25:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:25:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 22:25:09,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2020-12-21 22:25:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:09,060 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 22:25:09,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:25:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 22:25:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:25:09,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:09,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:09,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:25:09,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2020-12-21 22:25:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:09,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894826225] [2020-12-21 22:25:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:09,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894826225] [2020-12-21 22:25:09,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:09,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:25:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357320533] [2020-12-21 22:25:09,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:25:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:25:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:25:09,147 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-21 22:25:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:09,192 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-21 22:25:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:25:09,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-12-21 22:25:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:09,193 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:25:09,194 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:25:09,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:25:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:25:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 22:25:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:25:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-21 22:25:09,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-12-21 22:25:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-21 22:25:09,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:25:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-21 22:25:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:25:09,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:09,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:09,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:25:09,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2020-12-21 22:25:09,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:09,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655852554] [2020-12-21 22:25:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:25:09,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655852554] [2020-12-21 22:25:09,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:25:09,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:25:09,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19874609] [2020-12-21 22:25:09,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:25:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:25:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:25:09,363 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-12-21 22:25:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:09,448 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-12-21 22:25:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:25:09,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:25:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:09,450 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:25:09,450 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:25:09,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:25:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:25:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-12-21 22:25:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:25:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-21 22:25:09,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2020-12-21 22:25:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:09,459 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-21 22:25:09,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:25:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-21 22:25:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:25:09,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:09,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:09,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:25:09,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2020-12-21 22:25:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:09,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658025062] [2020-12-21 22:25:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:25:09,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658025062] [2020-12-21 22:25:09,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875402763] [2020-12-21 22:25:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:09,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:25:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:25:09,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:09,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:25:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682402467] [2020-12-21 22:25:09,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:25:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:25:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:25:09,788 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2020-12-21 22:25:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:09,844 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-21 22:25:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:25:09,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-21 22:25:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:09,848 INFO L225 Difference]: With dead ends: 49 [2020-12-21 22:25:09,848 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:25:09,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:25:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:25:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-21 22:25:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:25:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-21 22:25:09,866 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-21 22:25:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:09,866 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-21 22:25:09,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:25:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-21 22:25:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:25:09,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:09,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:10,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:10,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2020-12-21 22:25:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:10,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759116532] [2020-12-21 22:25:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:25:10,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759116532] [2020-12-21 22:25:10,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597285585] [2020-12-21 22:25:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:10,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:25:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:25:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:25:10,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:10,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 22:25:10,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209655960] [2020-12-21 22:25:10,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:25:10,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:25:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:25:10,273 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-12-21 22:25:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:10,368 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-12-21 22:25:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:25:10,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-21 22:25:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:10,370 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:25:10,370 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:25:10,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:25:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:25:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-12-21 22:25:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:25:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-21 22:25:10,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2020-12-21 22:25:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:10,379 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-21 22:25:10,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:25:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-21 22:25:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:25:10,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:10,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:10,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:10,595 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2020-12-21 22:25:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94694635] [2020-12-21 22:25:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:12,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94694635] [2020-12-21 22:25:12,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613883362] [2020-12-21 22:25:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:12,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:25:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 22:25:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:14,481 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:25:14,482 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2020-12-21 22:25:14,488 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:25:14,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:25:14,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:14,505 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:25:14,505 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2020-12-21 22:25:14,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:14,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:25:14,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:25:14,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:14,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:14,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 48 [2020-12-21 22:25:14,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47875846] [2020-12-21 22:25:14,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 22:25:14,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 22:25:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:25:14,859 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 48 states. [2020-12-21 22:25:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:17,791 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-12-21 22:25:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:25:17,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 35 [2020-12-21 22:25:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:17,793 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:25:17,793 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 22:25:17,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 22:25:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 22:25:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2020-12-21 22:25:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:25:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-21 22:25:17,810 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2020-12-21 22:25:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:17,811 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-21 22:25:17,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 22:25:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-21 22:25:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:25:17,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:17,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:18,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:18,024 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2020-12-21 22:25:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:18,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263600727] [2020-12-21 22:25:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 22:25:18,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263600727] [2020-12-21 22:25:18,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042790901] [2020-12-21 22:25:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:18,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:25:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:25:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 22:25:18,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:18,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:25:18,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115952390] [2020-12-21 22:25:18,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:25:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:25:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:25:18,277 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2020-12-21 22:25:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:18,484 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-12-21 22:25:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:25:18,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-21 22:25:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:18,486 INFO L225 Difference]: With dead ends: 104 [2020-12-21 22:25:18,486 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 22:25:18,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:25:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 22:25:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-21 22:25:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 22:25:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-21 22:25:18,514 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 37 [2020-12-21 22:25:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:18,517 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-21 22:25:18,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:25:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-21 22:25:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:25:18,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:18,523 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:18,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:18,740 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2020-12-21 22:25:18,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:18,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480896037] [2020-12-21 22:25:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-21 22:25:18,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480896037] [2020-12-21 22:25:18,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581393434] [2020-12-21 22:25:18,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:18,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 22:25:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:25:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-21 22:25:19,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:19,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-21 22:25:19,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276039802] [2020-12-21 22:25:19,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:25:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:25:19,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:25:19,009 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2020-12-21 22:25:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:19,227 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-12-21 22:25:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:25:19,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-12-21 22:25:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:19,230 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:25:19,230 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:25:19,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:25:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:25:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-21 22:25:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:25:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-21 22:25:19,257 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2020-12-21 22:25:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:19,259 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-21 22:25:19,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:25:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-21 22:25:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 22:25:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:19,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:19,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:19,482 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2020-12-21 22:25:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:19,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913567488] [2020-12-21 22:25:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913567488] [2020-12-21 22:25:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71358626] [2020-12-21 22:25:21,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:22,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 22:25:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-21 22:25:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:24,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:24,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:24,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 60 [2020-12-21 22:25:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050415316] [2020-12-21 22:25:24,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 22:25:24,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 22:25:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=3202, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 22:25:24,917 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 60 states. [2020-12-21 22:25:27,758 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-21 22:25:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:28,806 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-21 22:25:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:25:28,807 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 45 [2020-12-21 22:25:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:28,809 INFO L225 Difference]: With dead ends: 81 [2020-12-21 22:25:28,809 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 22:25:28,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=516, Invalid=4886, Unknown=0, NotChecked=0, Total=5402 [2020-12-21 22:25:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 22:25:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-12-21 22:25:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 22:25:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-12-21 22:25:28,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2020-12-21 22:25:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:28,822 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-12-21 22:25:28,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 22:25:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-12-21 22:25:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:25:28,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:28,823 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:29,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:25:29,037 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2020-12-21 22:25:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:29,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129455335] [2020-12-21 22:25:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:25:29,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129455335] [2020-12-21 22:25:29,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054035728] [2020-12-21 22:25:29,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:25:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:25:29,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:29,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:25:29,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034014591] [2020-12-21 22:25:29,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:25:29,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:25:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:25:29,369 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 16 states. [2020-12-21 22:25:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:29,632 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2020-12-21 22:25:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:25:29,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-12-21 22:25:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:29,638 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:25:29,638 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 22:25:29,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:25:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 22:25:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-21 22:25:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 22:25:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-12-21 22:25:29,653 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2020-12-21 22:25:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:29,654 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-12-21 22:25:29,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:25:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-12-21 22:25:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:25:29,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:29,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:29,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:25:29,861 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2020-12-21 22:25:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:29,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273240190] [2020-12-21 22:25:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 22:25:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273240190] [2020-12-21 22:25:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737178020] [2020-12-21 22:25:29,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:30,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:25:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:25:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 22:25:30,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:30,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-21 22:25:30,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130560444] [2020-12-21 22:25:30,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:25:30,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:25:30,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:25:30,143 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 16 states. [2020-12-21 22:25:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:25:30,461 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-12-21 22:25:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:25:30,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-12-21 22:25:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:25:30,462 INFO L225 Difference]: With dead ends: 101 [2020-12-21 22:25:30,462 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 22:25:30,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:25:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 22:25:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-21 22:25:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:25:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-21 22:25:30,470 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2020-12-21 22:25:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:25:30,470 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-21 22:25:30,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:25:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-21 22:25:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 22:25:30,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:25:30,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:25:30,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:25:30,686 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:25:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:25:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2020-12-21 22:25:30,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:25:30,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905747201] [2020-12-21 22:25:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:25:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:25:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:25:35,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905747201] [2020-12-21 22:25:35,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617902127] [2020-12-21 22:25:35,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:25:35,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:25:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:25:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-21 22:25:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:25:35,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:25:35,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:25:35,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:25:35,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:25:35,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-21 22:25:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:25:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:25:43,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:25:43,833 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:25:43,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2020-12-21 22:25:43,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:25:43,839 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-21 22:25:43,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:43,841 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-21 22:25:43,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:25:43,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:25:43,847 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:25:43,861 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:25:43,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:43,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:25:43,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2020-12-21 22:25:44,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:44,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:25:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:25:44,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:25:44,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 40] total 83 [2020-12-21 22:25:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586292513] [2020-12-21 22:25:44,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-21 22:25:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:25:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-21 22:25:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=6456, Unknown=1, NotChecked=0, Total=6806 [2020-12-21 22:25:44,536 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 83 states. [2020-12-21 22:25:47,594 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-21 22:25:48,023 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-21 22:25:49,622 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-12-21 22:25:52,387 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-12-21 22:26:00,065 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-21 22:26:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:04,057 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-12-21 22:26:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-21 22:26:04,059 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 55 [2020-12-21 22:26:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:04,060 INFO L225 Difference]: With dead ends: 97 [2020-12-21 22:26:04,060 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 22:26:04,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4354 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=879, Invalid=16941, Unknown=2, NotChecked=0, Total=17822 [2020-12-21 22:26:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 22:26:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-12-21 22:26:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 22:26:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-12-21 22:26:04,095 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2020-12-21 22:26:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:04,095 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-12-21 22:26:04,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-21 22:26:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-12-21 22:26:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 22:26:04,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:04,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:04,311 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2020-12-21 22:26:04,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:04,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132437838] [2020-12-21 22:26:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 22:26:04,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132437838] [2020-12-21 22:26:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177483413] [2020-12-21 22:26:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:26:04,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:26:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:26:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 22:26:04,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:04,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-21 22:26:04,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517441566] [2020-12-21 22:26:04,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:26:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:26:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:26:04,796 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 19 states. [2020-12-21 22:26:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:05,335 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2020-12-21 22:26:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:26:05,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-12-21 22:26:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:05,337 INFO L225 Difference]: With dead ends: 160 [2020-12-21 22:26:05,337 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 22:26:05,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:26:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 22:26:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-21 22:26:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 22:26:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-21 22:26:05,349 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2020-12-21 22:26:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:05,349 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-21 22:26:05,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:26:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-21 22:26:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:26:05,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:05,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:05,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:26:05,558 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2020-12-21 22:26:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:05,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705512252] [2020-12-21 22:26:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 22:26:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705512252] [2020-12-21 22:26:05,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854250057] [2020-12-21 22:26:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:26:05,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:26:05,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:26:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-21 22:26:06,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:06,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-21 22:26:06,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714901923] [2020-12-21 22:26:06,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:26:06,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:26:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:26:06,125 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 19 states. [2020-12-21 22:26:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:26:06,685 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-12-21 22:26:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:26:06,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-12-21 22:26:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:26:06,688 INFO L225 Difference]: With dead ends: 119 [2020-12-21 22:26:06,688 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 22:26:06,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:26:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 22:26:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-12-21 22:26:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:26:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-21 22:26:06,697 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2020-12-21 22:26:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:26:06,698 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-21 22:26:06,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:26:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-21 22:26:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 22:26:06,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:26:06,700 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:26:06,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:26:06,902 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:26:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:26:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2020-12-21 22:26:06,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:26:06,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780998988] [2020-12-21 22:26:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:26:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:26:08,619 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-21 22:26:08,814 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-12-21 22:26:10,250 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-21 22:26:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:26:14,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780998988] [2020-12-21 22:26:14,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628698231] [2020-12-21 22:26:14,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:26:14,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 22:26:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:26:14,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-21 22:26:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:26:29,194 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:26:29,195 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2020-12-21 22:26:29,199 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:26:29,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:26:29,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:29,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:26:29,231 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:18 [2020-12-21 22:26:29,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:30,215 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:26:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:26:30,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:26:30,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51] total 99 [2020-12-21 22:26:30,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180852586] [2020-12-21 22:26:30,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-12-21 22:26:30,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:26:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-12-21 22:26:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=9312, Unknown=0, NotChecked=0, Total=9702 [2020-12-21 22:26:30,592 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 99 states. [2020-12-21 22:26:37,080 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-12-21 22:26:40,079 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-21 22:26:40,912 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-12-21 22:26:43,425 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-12-21 22:26:45,160 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2020-12-21 22:26:47,485 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2020-12-21 22:26:48,259 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 48 [2020-12-21 22:26:49,220 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-12-21 22:26:49,989 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-12-21 22:26:53,332 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-21 22:26:54,121 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-21 22:26:55,075 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-21 22:26:55,828 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-21 22:26:56,796 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-21 22:26:57,554 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-21 22:26:58,357 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-21 22:27:01,331 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-12-21 22:27:02,869 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-21 22:27:04,257 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-21 22:27:05,628 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-21 22:27:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:09,564 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-12-21 22:27:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-21 22:27:09,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 65 [2020-12-21 22:27:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:09,570 INFO L225 Difference]: With dead ends: 112 [2020-12-21 22:27:09,570 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:27:09,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5337 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=1051, Invalid=24071, Unknown=0, NotChecked=0, Total=25122 [2020-12-21 22:27:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:27:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-12-21 22:27:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-21 22:27:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-12-21 22:27:09,588 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2020-12-21 22:27:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:09,589 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-12-21 22:27:09,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-12-21 22:27:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-12-21 22:27:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 22:27:09,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:09,590 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:09,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:27:09,796 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2020-12-21 22:27:09,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:09,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386173728] [2020-12-21 22:27:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 22:27:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386173728] [2020-12-21 22:27:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432351880] [2020-12-21 22:27:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:27:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:10,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:27:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 22:27:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-21 22:27:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661116276] [2020-12-21 22:27:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:27:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:27:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:27:11,035 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 22 states. [2020-12-21 22:27:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:12,314 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2020-12-21 22:27:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:27:12,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-21 22:27:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:12,319 INFO L225 Difference]: With dead ends: 188 [2020-12-21 22:27:12,319 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:27:12,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:27:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:27:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-21 22:27:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 22:27:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2020-12-21 22:27:12,331 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2020-12-21 22:27:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:12,332 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2020-12-21 22:27:12,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:27:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2020-12-21 22:27:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 22:27:12,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:12,333 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:12,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:27:12,547 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:12,548 INFO L82 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2020-12-21 22:27:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:12,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691098925] [2020-12-21 22:27:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-12-21 22:27:12,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691098925] [2020-12-21 22:27:12,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140273244] [2020-12-21 22:27:12,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:27:13,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:27:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:27:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-12-21 22:27:13,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:27:13,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2020-12-21 22:27:13,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383848288] [2020-12-21 22:27:13,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:27:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:27:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:27:13,713 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand 22 states. [2020-12-21 22:27:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:14,886 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-12-21 22:27:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:27:14,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-12-21 22:27:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:14,891 INFO L225 Difference]: With dead ends: 137 [2020-12-21 22:27:14,891 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 22:27:14,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:27:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 22:27:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-12-21 22:27:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:27:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-21 22:27:14,902 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2020-12-21 22:27:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:14,902 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-21 22:27:14,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:27:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-21 22:27:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 22:27:14,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:14,903 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:15,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:15,119 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:15,120 INFO L82 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2020-12-21 22:27:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:15,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443194152] [2020-12-21 22:27:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:16,232 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-12-21 22:27:16,801 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-21 22:27:17,213 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-12-21 22:27:17,596 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-21 22:27:17,903 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-21 22:27:18,225 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-21 22:27:18,514 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-21 22:27:18,832 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-21 22:27:19,197 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-21 22:27:19,613 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-12-21 22:27:19,934 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-21 22:27:20,275 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-21 22:27:20,617 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-21 22:27:20,849 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-21 22:27:21,102 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-21 22:27:21,348 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-21 22:27:21,779 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-12-21 22:27:22,234 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-12-21 22:27:22,676 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-21 22:27:23,062 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-21 22:27:23,403 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-21 22:27:23,711 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-12-21 22:27:24,034 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-12-21 22:27:24,403 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-21 22:27:24,922 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-21 22:27:25,868 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-21 22:27:26,189 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-21 22:27:29,572 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-12-21 22:27:30,079 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-21 22:27:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:32,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443194152] [2020-12-21 22:27:32,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377702103] [2020-12-21 22:27:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:27:32,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 22:27:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:32,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 126 conjunts are in the unsatisfiable core [2020-12-21 22:27:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:33,214 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:27:33,215 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:27:33,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:27:33,234 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:27:33,235 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-21 22:28:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:28:02,332 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-21 22:28:02,335 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:28:02,335 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2020-12-21 22:28:02,338 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-21 22:28:02,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:02,339 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-21 22:28:02,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:02,343 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-12-21 22:28:02,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:02,347 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 2, 3, 1] term [2020-12-21 22:28:02,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:02,352 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 2, 3, 1] term [2020-12-21 22:28:02,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:28:02,365 INFO L547 ElimStorePlain]: Start of recursive call 2: 5 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-21 22:28:02,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:28:02,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:02,411 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:28:02,412 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:18 [2020-12-21 22:28:03,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:03,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:28:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:28:04,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:28:04,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 58] total 118 [2020-12-21 22:28:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563359321] [2020-12-21 22:28:04,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-12-21 22:28:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-12-21 22:28:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=13239, Unknown=0, NotChecked=0, Total=13806 [2020-12-21 22:28:04,417 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 118 states. [2020-12-21 22:28:13,378 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-12-21 22:28:14,147 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-12-21 22:28:14,865 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-12-21 22:28:15,613 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-12-21 22:28:16,512 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2020-12-21 22:28:17,448 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-12-21 22:28:18,445 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2020-12-21 22:28:19,412 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-12-21 22:28:20,693 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-12-21 22:28:21,997 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-21 22:28:23,227 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-21 22:28:24,146 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-12-21 22:28:25,176 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-21 22:28:26,530 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2020-12-21 22:28:27,584 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-12-21 22:28:28,584 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-12-21 22:28:29,365 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-12-21 22:28:32,055 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-12-21 22:28:33,011 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-12-21 22:28:33,915 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-12-21 22:28:34,835 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-12-21 22:28:35,808 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-21 22:28:36,880 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-12-21 22:28:38,309 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-12-21 22:28:45,148 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-12-21 22:28:46,339 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-21 22:28:47,659 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-12-21 22:28:48,831 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-21 22:28:50,193 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2020-12-21 22:28:52,476 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2020-12-21 22:28:55,435 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-21 22:29:04,974 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-12-21 22:29:07,222 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-12-21 22:29:08,134 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-21 22:29:09,233 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2020-12-21 22:29:11,121 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-21 22:29:13,037 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-12-21 22:29:15,108 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-21 22:29:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:18,775 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-12-21 22:29:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-21 22:29:18,779 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 75 [2020-12-21 22:29:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:18,781 INFO L225 Difference]: With dead ends: 128 [2020-12-21 22:29:18,781 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:29:18,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8768 ImplicationChecksByTransitivity, 92.7s TimeCoverageRelationStatistics Valid=1434, Invalid=33347, Unknown=1, NotChecked=0, Total=34782 [2020-12-21 22:29:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:29:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2020-12-21 22:29:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:29:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-12-21 22:29:18,799 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2020-12-21 22:29:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:18,799 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-12-21 22:29:18,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-12-21 22:29:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-12-21 22:29:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 22:29:18,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:18,800 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:19,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:29:19,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2020-12-21 22:29:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:19,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658072678] [2020-12-21 22:29:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 22:29:19,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658072678] [2020-12-21 22:29:19,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325511759] [2020-12-21 22:29:19,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:29:19,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:29:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 22:29:20,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:29:20,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2020-12-21 22:29:20,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886156507] [2020-12-21 22:29:20,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:29:20,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:29:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:29:20,439 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 25 states. [2020-12-21 22:29:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:22,367 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2020-12-21 22:29:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:29:22,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-12-21 22:29:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:22,372 INFO L225 Difference]: With dead ends: 216 [2020-12-21 22:29:22,372 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 22:29:22,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 22:29:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 22:29:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-21 22:29:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:29:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2020-12-21 22:29:22,387 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 77 [2020-12-21 22:29:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:22,387 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2020-12-21 22:29:22,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:29:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2020-12-21 22:29:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:29:22,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:22,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:22,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:22,604 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1623823828, now seen corresponding path program 17 times [2020-12-21 22:29:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:22,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202742905] [2020-12-21 22:29:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat