/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:19:40,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:19:40,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:19:40,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:19:40,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:19:40,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:19:40,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:19:40,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:19:40,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:19:40,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:19:40,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:19:40,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:19:40,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:19:40,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:19:40,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:19:40,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:19:40,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:19:40,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:19:40,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:19:40,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:19:40,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:19:40,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:19:40,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:19:40,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:19:40,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:19:40,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:19:40,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:19:40,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:19:40,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:19:40,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:19:40,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:19:40,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:19:40,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:19:40,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:19:40,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:19:40,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:19:40,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:19:40,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:19:40,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:19:40,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:19:40,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:19:40,157 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:19:40,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:19:40,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:19:40,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:19:40,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:19:40,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:19:40,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:19:40,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:19:40,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:19:40,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:19:40,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:19:40,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:19:40,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:19:40,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:19:40,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:19:40,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:19:40,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:19:40,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:19:40,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:19:40,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:19:40,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:19:40,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:19:40,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:19:40,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:19:40,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:19:40,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:19:40,614 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:19:40,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_sea.ch.c [2020-12-22 04:19:40,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8835d4a10/ae4651e4f5b0459dbee603914031b2e0/FLAG21b1b63c5 [2020-12-22 04:19:41,333 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:19:41,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_sea.ch.c [2020-12-22 04:19:41,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8835d4a10/ae4651e4f5b0459dbee603914031b2e0/FLAG21b1b63c5 [2020-12-22 04:19:41,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8835d4a10/ae4651e4f5b0459dbee603914031b2e0 [2020-12-22 04:19:41,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:19:41,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:19:41,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:19:41,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:19:41,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:19:41,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:19:41" (1/1) ... [2020-12-22 04:19:41,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452ce3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:41, skipping insertion in model container [2020-12-22 04:19:41,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:19:41" (1/1) ... [2020-12-22 04:19:41,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:19:41,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:19:42,020 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/loops/linear_sea.ch.c[358,371] [2020-12-22 04:19:42,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:19:42,066 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:19:42,081 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_sea.ch.c[358,371] [2020-12-22 04:19:42,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:19:42,121 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:19:42,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42 WrapperNode [2020-12-22 04:19:42,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:19:42,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:19:42,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:19:42,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:19:42,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:19:42,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:19:42,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:19:42,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:19:42,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... [2020-12-22 04:19:42,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:19:42,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:19:42,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:19:42,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:19:42,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:19:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:19:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:19:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:19:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 04:19:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:19:42,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:19:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:19:42,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:19:42,688 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 04:19:42,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:19:42 BoogieIcfgContainer [2020-12-22 04:19:42,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:19:42,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:19:42,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:19:42,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:19:42,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:19:41" (1/3) ... [2020-12-22 04:19:42,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a92a3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:19:42, skipping insertion in model container [2020-12-22 04:19:42,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:19:42" (2/3) ... [2020-12-22 04:19:42,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a92a3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:19:42, skipping insertion in model container [2020-12-22 04:19:42,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:19:42" (3/3) ... [2020-12-22 04:19:42,700 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2020-12-22 04:19:42,709 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:19:42,715 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:19:42,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:19:42,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:19:42,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:19:42,821 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:19:42,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:19:42,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:19:42,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:19:42,822 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:19:42,822 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:19:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-22 04:19:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:19:42,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:42,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:42,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 132774875, now seen corresponding path program 1 times [2020-12-22 04:19:42,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:42,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027050556] [2020-12-22 04:19:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:43,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027050556] [2020-12-22 04:19:43,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:19:43,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:19:43,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239900184] [2020-12-22 04:19:43,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:19:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:19:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:19:43,136 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-22 04:19:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:43,157 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-22 04:19:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:19:43,159 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 04:19:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:43,177 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:19:43,177 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:19:43,181 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 [2020-12-22 04:19:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:19:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:19:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:19:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-22 04:19:43,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-22 04:19:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:43,224 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-22 04:19:43,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:19:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-22 04:19:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:19:43,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:43,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:43,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:19:43,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash -317112588, now seen corresponding path program 1 times [2020-12-22 04:19:43,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:43,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711346117] [2020-12-22 04:19:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:43,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711346117] [2020-12-22 04:19:43,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:19:43,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:19:43,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564962441] [2020-12-22 04:19:43,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:19:43,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:19:43,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:19:43,371 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2020-12-22 04:19:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:43,404 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-12-22 04:19:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:19:43,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 04:19:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:43,406 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:19:43,406 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:19:43,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:19:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:19:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:19:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:19:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-22 04:19:43,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2020-12-22 04:19:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:43,411 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-22 04:19:43,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:19:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-22 04:19:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:19:43,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:43,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:43,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:19:43,412 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -317053006, now seen corresponding path program 1 times [2020-12-22 04:19:43,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:43,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242832009] [2020-12-22 04:19:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:43,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242832009] [2020-12-22 04:19:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:19:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:19:43,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607262299] [2020-12-22 04:19:43,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:19:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:19:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:19:43,753 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-12-22 04:19:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:43,799 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-22 04:19:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:19:43,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:19:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:43,802 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:19:43,802 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:19:43,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:19:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:19:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:19:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:19:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:19:43,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-22 04:19:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:43,812 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:19:43,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:19:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:19:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:19:43,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:43,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:43,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:19:43,818 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1714420412, now seen corresponding path program 1 times [2020-12-22 04:19:43,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:43,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614071801] [2020-12-22 04:19:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:44,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614071801] [2020-12-22 04:19:44,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652252197] [2020-12-22 04:19:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:19:44,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:19:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:44,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2020-12-22 04:19:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717253353] [2020-12-22 04:19:44,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:19:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:19:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:19:44,342 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 10 states. [2020-12-22 04:19:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:44,851 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-12-22 04:19:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:19:44,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 04:19:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:44,853 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:19:44,853 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:19:44,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:19:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:19:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:19:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:19:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:19:44,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-22 04:19:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:44,861 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:19:44,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:19:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:19:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:19:44,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:44,862 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:45,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:45,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 488445872, now seen corresponding path program 1 times [2020-12-22 04:19:45,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:45,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167570686] [2020-12-22 04:19:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:45,508 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2020-12-22 04:19:46,020 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 84 [2020-12-22 04:19:46,491 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 83 [2020-12-22 04:19:46,929 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-12-22 04:19:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167570686] [2020-12-22 04:19:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366314160] [2020-12-22 04:19:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:19:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:47,406 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 21 treesize of output 17 [2020-12-22 04:19:47,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:47,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:47,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:47,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-22 04:19:47,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:47,795 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:47,796 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 53 [2020-12-22 04:19:47,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:47,808 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:47,841 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:47,842 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 68 [2020-12-22 04:19:47,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:47,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:47,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:47,856 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:47,858 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:47,932 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.5 percent of original size [2020-12-22 04:19:47,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:19:47,934 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:103, output treesize:65 [2020-12-22 04:19:48,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:19:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:48,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:48,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 04:19:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405779180] [2020-12-22 04:19:48,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:19:48,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:19:48,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:19:48,526 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2020-12-22 04:19:48,846 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-12-22 04:19:49,135 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 58 [2020-12-22 04:19:49,438 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 59 [2020-12-22 04:19:49,829 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 67 [2020-12-22 04:19:50,174 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 46 [2020-12-22 04:19:50,370 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 04:19:50,641 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2020-12-22 04:19:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:19:51,081 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-22 04:19:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:19:51,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-12-22 04:19:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:19:51,083 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:19:51,083 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:19:51,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:19:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:19:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-22 04:19:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:19:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 04:19:51,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-12-22 04:19:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:19:51,092 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 04:19:51,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:19:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 04:19:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:19:51,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:19:51,093 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:19:51,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:51,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:19:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:19:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 570181232, now seen corresponding path program 2 times [2020-12-22 04:19:51,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:19:51,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730816153] [2020-12-22 04:19:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:19:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:19:52,206 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 44 [2020-12-22 04:19:52,439 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 48 [2020-12-22 04:19:53,162 WARN L197 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 71 [2020-12-22 04:19:54,016 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 82 [2020-12-22 04:19:54,648 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-12-22 04:19:55,459 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 65 [2020-12-22 04:19:56,430 WARN L197 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2020-12-22 04:19:57,116 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 55 [2020-12-22 04:19:57,687 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 35 [2020-12-22 04:19:58,108 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 54 [2020-12-22 04:19:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730816153] [2020-12-22 04:19:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36259847] [2020-12-22 04:19:58,211 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:19:58,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:19:58,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:19:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:19:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:19:58,410 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 21 treesize of output 17 [2020-12-22 04:19:58,411 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:58,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:58,431 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:19:58,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-22 04:19:58,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:19:59,011 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:59,012 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 55 [2020-12-22 04:19:59,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:59,017 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:59,056 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:19:59,056 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 72 [2020-12-22 04:19:59,061 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:59,062 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:59,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:59,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:19:59,068 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:19:59,164 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2020-12-22 04:19:59,167 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:19:59,168 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:113, output treesize:71 [2020-12-22 04:19:59,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:19:59,848 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:19:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:19:59,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:19:59,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2020-12-22 04:19:59,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245994954] [2020-12-22 04:19:59,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:19:59,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:19:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:19:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:19:59,925 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 24 states. [2020-12-22 04:20:00,477 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-12-22 04:20:00,737 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-12-22 04:20:01,079 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2020-12-22 04:20:01,464 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 48 [2020-12-22 04:20:01,868 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2020-12-22 04:20:02,420 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 58 [2020-12-22 04:20:02,776 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 40 [2020-12-22 04:20:03,172 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 52 [2020-12-22 04:20:03,571 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2020-12-22 04:20:03,797 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2020-12-22 04:20:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:03,946 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-22 04:20:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:20:03,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-22 04:20:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:03,949 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:20:03,949 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:20:03,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:20:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:20:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 04:20:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:20:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 04:20:03,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-12-22 04:20:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:03,967 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 04:20:03,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:20:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 04:20:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:20:03,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:03,971 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:04,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:04,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1970775806, now seen corresponding path program 3 times [2020-12-22 04:20:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:04,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128128255] [2020-12-22 04:20:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:04,811 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2020-12-22 04:20:05,040 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 63 [2020-12-22 04:20:05,784 WARN L197 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2020-12-22 04:20:06,265 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 88 [2020-12-22 04:20:06,954 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 92 [2020-12-22 04:20:07,575 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 82 [2020-12-22 04:20:08,395 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2020-12-22 04:20:09,280 WARN L197 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 103 [2020-12-22 04:20:10,175 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2020-12-22 04:20:10,881 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-12-22 04:20:11,315 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2020-12-22 04:20:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:11,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128128255] [2020-12-22 04:20:11,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966745953] [2020-12-22 04:20:11,442 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:12,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:20:12,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:20:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:12,142 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 21 treesize of output 17 [2020-12-22 04:20:12,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,151 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 21 treesize of output 17 [2020-12-22 04:20:12,152 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:12,247 INFO L625 ElimStorePlain]: treesize reduction 5, result has 93.8 percent of original size [2020-12-22 04:20:12,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:12,248 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:89, output treesize:76 [2020-12-22 04:20:13,493 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 04:20:13,994 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 04:20:14,828 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 04:20:14,838 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 5, 1] term [2020-12-22 04:20:14,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:14,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:20:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:14,897 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 15 [2020-12-22 04:20:14,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:15,042 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 04:20:15,044 INFO L348 Elim1Store]: treesize reduction 68, result has 53.1 percent of original size [2020-12-22 04:20:15,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 92 [2020-12-22 04:20:15,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,057 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:15,349 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 04:20:15,350 INFO L625 ElimStorePlain]: treesize reduction 89, result has 68.2 percent of original size [2020-12-22 04:20:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:15,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:15,455 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:15,456 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 3 case distinctions, treesize of input 64 treesize of output 92 [2020-12-22 04:20:15,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,467 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:15,605 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 04:20:15,606 INFO L348 Elim1Store]: treesize reduction 68, result has 53.1 percent of original size [2020-12-22 04:20:15,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 91 [2020-12-22 04:20:15,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:15,613 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:15,870 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-12-22 04:20:15,871 INFO L625 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2020-12-22 04:20:15,872 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-22 04:20:15,872 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:353, output treesize:153 [2020-12-22 04:20:16,216 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 04:20:16,549 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 7, 1] term [2020-12-22 04:20:16,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:17,143 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-22 04:20:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:17,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:17,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2020-12-22 04:20:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128461099] [2020-12-22 04:20:17,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:20:17,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:17,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:20:17,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:20:17,159 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 28 states. [2020-12-22 04:20:17,432 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-12-22 04:20:17,661 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-12-22 04:20:18,023 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 41 [2020-12-22 04:20:18,309 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-12-22 04:20:18,852 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 41 [2020-12-22 04:20:19,593 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 73 [2020-12-22 04:20:20,096 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 47 [2020-12-22 04:20:20,955 WARN L197 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 56 [2020-12-22 04:20:21,676 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 59 [2020-12-22 04:20:23,343 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 205 DAG size of output: 77 [2020-12-22 04:20:25,442 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 205 DAG size of output: 78 [2020-12-22 04:20:28,489 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 220 DAG size of output: 86 [2020-12-22 04:20:32,068 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 200 DAG size of output: 64 [2020-12-22 04:20:34,388 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 201 DAG size of output: 65 [2020-12-22 04:20:37,067 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 166 DAG size of output: 61 [2020-12-22 04:20:40,165 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 166 DAG size of output: 62 [2020-12-22 04:20:41,289 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-12-22 04:20:42,108 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-12-22 04:20:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:43,184 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-12-22 04:20:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:20:43,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 25 [2020-12-22 04:20:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:43,186 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:20:43,187 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:20:43,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=289, Invalid=1967, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:20:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:20:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 04:20:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:20:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 04:20:43,197 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2020-12-22 04:20:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:43,198 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 04:20:43,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:20:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 04:20:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:20:43,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:43,199 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:43,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:43,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash 511130498, now seen corresponding path program 4 times [2020-12-22 04:20:43,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:43,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385859748] [2020-12-22 04:20:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:44,236 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-12-22 04:20:44,526 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-12-22 04:20:45,028 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 04:20:45,477 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-12-22 04:20:45,922 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 04:20:46,533 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 86 [2020-12-22 04:20:47,411 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 78 [2020-12-22 04:20:47,920 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 67 [2020-12-22 04:20:48,443 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 04:20:48,967 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 04:20:49,453 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2020-12-22 04:20:50,149 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-12-22 04:20:51,143 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 61 [2020-12-22 04:20:51,445 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 33 [2020-12-22 04:20:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385859748] [2020-12-22 04:20:51,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255356712] [2020-12-22 04:20:51,796 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:52,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:20:52,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:20:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:20:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:52,168 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 21 treesize of output 17 [2020-12-22 04:20:52,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,184 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 21 treesize of output 17 [2020-12-22 04:20:52,185 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:52,317 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2020-12-22 04:20:52,318 INFO L625 ElimStorePlain]: treesize reduction 5, result has 93.8 percent of original size [2020-12-22 04:20:52,320 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:20:52,320 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:89, output treesize:76 [2020-12-22 04:20:53,557 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-12-22 04:20:53,557 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:53,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:20:53,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 7 [2020-12-22 04:20:53,595 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:53,614 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:53,614 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 32 treesize of output 32 [2020-12-22 04:20:53,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:53,622 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:53,871 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-12-22 04:20:53,872 INFO L625 ElimStorePlain]: treesize reduction 35, result has 77.3 percent of original size [2020-12-22 04:20:53,902 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:53,902 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 32 treesize of output 32 [2020-12-22 04:20:53,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:53,912 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:53,931 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:20:53,931 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 31 treesize of output 31 [2020-12-22 04:20:53,934 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-22 04:20:54,091 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-12-22 04:20:54,092 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2020-12-22 04:20:54,094 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-22 04:20:54,094 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:199, output treesize:73 [2020-12-22 04:20:55,569 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-22 04:20:55,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:20:56,047 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-12-22 04:20:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:56,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:20:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2020-12-22 04:20:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678294698] [2020-12-22 04:20:56,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:20:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:20:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:20:56,485 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 33 states. [2020-12-22 04:20:56,986 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2020-12-22 04:20:57,687 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2020-12-22 04:20:58,222 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2020-12-22 04:20:58,742 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2020-12-22 04:20:59,321 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2020-12-22 04:21:00,198 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2020-12-22 04:21:00,790 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-12-22 04:21:01,597 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2020-12-22 04:21:02,435 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-12-22 04:21:03,202 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2020-12-22 04:21:03,845 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 45 [2020-12-22 04:21:04,633 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2020-12-22 04:21:05,786 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-12-22 04:21:06,419 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2020-12-22 04:21:07,052 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-12-22 04:21:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:07,193 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-12-22 04:21:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:21:07,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-22 04:21:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:07,198 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:21:07,198 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:21:07,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:21:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:21:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-22 04:21:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:21:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-22 04:21:07,209 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-12-22 04:21:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:07,209 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-22 04:21:07,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:21:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-22 04:21:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:21:07,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:07,211 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:07,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:07,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash -214601040, now seen corresponding path program 5 times [2020-12-22 04:21:07,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:07,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308164100] [2020-12-22 04:21:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:08,122 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2020-12-22 04:21:08,518 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2020-12-22 04:21:08,861 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 61 [2020-12-22 04:21:09,173 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2020-12-22 04:21:09,416 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-12-22 04:21:09,729 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2020-12-22 04:21:10,031 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2020-12-22 04:21:10,655 WARN L197 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2020-12-22 04:21:11,399 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2020-12-22 04:21:12,203 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 74 [2020-12-22 04:21:13,487 WARN L197 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-12-22 04:21:14,912 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-12-22 04:21:16,294 WARN L197 SmtUtils]: Spent 960.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-12-22 04:21:17,515 WARN L197 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 04:21:19,096 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-12-22 04:21:19,917 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2020-12-22 04:21:20,664 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-12-22 04:21:21,306 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2020-12-22 04:21:21,803 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 04:21:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308164100] [2020-12-22 04:21:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131982273] [2020-12-22 04:21:22,069 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:22,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 04:21:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:22,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:21:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:23,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:21:23,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-22 04:21:23,064 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:23,424 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 04:21:23,425 INFO L625 ElimStorePlain]: treesize reduction 31, result has 65.9 percent of original size [2020-12-22 04:21:23,440 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 21 treesize of output 17 [2020-12-22 04:21:23,442 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:23,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:23,534 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:21:23,534 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:161, output treesize:56 [2020-12-22 04:21:24,007 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 04:21:24,950 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 04:21:26,079 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 04:21:26,663 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 04:21:26,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:26,795 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,795 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 32 treesize of output 32 [2020-12-22 04:21:26,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:26,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:26,832 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:21:26,833 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 31 treesize of output 31 [2020-12-22 04:21:26,837 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 04:21:27,332 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2020-12-22 04:21:27,333 INFO L625 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2020-12-22 04:21:27,338 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 04:21:27,338 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:137, output treesize:91 [2020-12-22 04:21:28,111 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 04:21:28,788 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-22 04:21:29,343 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-22 04:21:30,042 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-22 04:21:31,675 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 04:21:32,649 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 04:21:33,536 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 04:21:33,599 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:21:33,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts