/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/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:17:19,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:17:19,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:17:19,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:17:19,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:17:19,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:17:19,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:17:19,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:17:19,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:17:19,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:17:19,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:17:19,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:17:19,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:17:19,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:17:19,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:17:19,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:17:19,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:17:19,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:17:19,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:17:19,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:17:19,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:17:19,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:17:19,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:17:19,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:17:19,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:17:19,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:17:19,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:17:19,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:17:19,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:17:19,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:17:19,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:17:19,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:17:19,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:17:19,544 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:17:19,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:17:19,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:17:19,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:17:19,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:17:19,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:17:19,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:17:19,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:17:19,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:17:19,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:17:19,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:17:19,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:17:19,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:17:19,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:17:19,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:17:19,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:17:19,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:17:19,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:17:19,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:17:19,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:17:19,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:17:19,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:17:20,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:17:20,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:17:20,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:17:20,058 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:17:20,059 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:17:20,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-1.c [2020-12-22 04:17:20,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366b882bb/d550b8248afb4861b93b5d15287a0b3b/FLAG149e57ed4 [2020-12-22 04:17:20,844 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:17:20,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c [2020-12-22 04:17:20,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366b882bb/d550b8248afb4861b93b5d15287a0b3b/FLAG149e57ed4 [2020-12-22 04:17:21,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366b882bb/d550b8248afb4861b93b5d15287a0b3b [2020-12-22 04:17:21,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:17:21,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:17:21,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:21,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:17:21,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:17:21,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295d94c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21, skipping insertion in model container [2020-12-22 04:17:21,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:17:21,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:17:21,367 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/eureka_01-1.c[446,459] [2020-12-22 04:17:21,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:21,416 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:17:21,430 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/eureka_01-1.c[446,459] [2020-12-22 04:17:21,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:17:21,475 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:17:21,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21 WrapperNode [2020-12-22 04:17:21,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:17:21,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:21,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:17:21,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:17:21,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:17:21,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:17:21,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:17:21,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:17:21,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (1/1) ... [2020-12-22 04:17:21,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:17:21,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:17:21,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:17:21,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:17:21,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (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 04:17:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:17:21,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:17:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:17:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:17:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:17:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:17:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:17:22,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:17:22,188 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 04:17:22,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:22 BoogieIcfgContainer [2020-12-22 04:17:22,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:17:22,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:17:22,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:17:22,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:17:22,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:17:21" (1/3) ... [2020-12-22 04:17:22,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b1f69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:22, skipping insertion in model container [2020-12-22 04:17:22,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:17:21" (2/3) ... [2020-12-22 04:17:22,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b1f69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:17:22, skipping insertion in model container [2020-12-22 04:17:22,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:22" (3/3) ... [2020-12-22 04:17:22,214 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-12-22 04:17:22,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:17:22,243 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:17:22,274 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:17:22,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:17:22,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:17:22,325 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:17:22,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:17:22,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:17:22,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:17:22,327 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:17:22,327 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:17:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-22 04:17:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:17:22,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:22,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:22,359 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2020-12-22 04:17:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:22,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130121001] [2020-12-22 04:17:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:22,838 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 04:17:22,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130121001] [2020-12-22 04:17:22,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:22,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:17:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42538977] [2020-12-22 04:17:22,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:17:22,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:17:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:17:22,865 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-12-22 04:17:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:23,053 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2020-12-22 04:17:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:17:23,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 04:17:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:23,071 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:17:23,071 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:17:23,075 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 04:17:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:17:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2020-12-22 04:17:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:17:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-22 04:17:23,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-12-22 04:17:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:23,123 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-22 04:17:23,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:17:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-22 04:17:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:17:23,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:23,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:23,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:17:23,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:23,130 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2020-12-22 04:17:23,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:23,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259628882] [2020-12-22 04:17:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:23,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259628882] [2020-12-22 04:17:23,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819608334] [2020-12-22 04:17:23,381 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 04:17:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:17:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:23,618 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 18 treesize of output 14 [2020-12-22 04:17:23,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:23,633 INFO L625 ElimStorePlain]: treesize reduction 7, result has 72.0 percent of original size [2020-12-22 04:17:23,638 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:23,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2020-12-22 04:17:23,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:23,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:23,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:23,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:23,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:17:23,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214933407] [2020-12-22 04:17:23,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:17:23,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:17:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:17:23,794 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 7 states. [2020-12-22 04:17:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:24,004 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-22 04:17:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:17:24,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 04:17:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:24,008 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:17:24,008 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:17:24,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:17:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2020-12-22 04:17:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:17:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-12-22 04:17:24,019 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-12-22 04:17:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:24,020 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-12-22 04:17:24,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:17:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-12-22 04:17:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:17:24,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:24,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:24,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:17:24,230 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2020-12-22 04:17:24,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:24,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591997313] [2020-12-22 04:17:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:24,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591997313] [2020-12-22 04:17:24,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:24,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:17:24,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227916779] [2020-12-22 04:17:24,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:17:24,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:24,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:17:24,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:17:24,276 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2020-12-22 04:17:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:24,314 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-12-22 04:17:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:17:24,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 04:17:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:24,318 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:17:24,318 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:17:24,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:17:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:17:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 04:17:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:17:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-12-22 04:17:24,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2020-12-22 04:17:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:24,334 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-12-22 04:17:24,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:17:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-12-22 04:17:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:17:24,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:24,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:24,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:17:24,338 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2020-12-22 04:17:24,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:24,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936305984] [2020-12-22 04:17:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936305984] [2020-12-22 04:17:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138862453] [2020-12-22 04:17:24,422 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 04:17:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:17:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:24,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:24,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-12-22 04:17:24,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239540762] [2020-12-22 04:17:24,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:17:24,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:17:24,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:17:24,550 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 8 states. [2020-12-22 04:17:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:24,638 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-22 04:17:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:17:24,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 04:17:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:24,640 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:17:24,640 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:17:24,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:17:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-12-22 04:17:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:17:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-12-22 04:17:24,651 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2020-12-22 04:17:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:24,651 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-12-22 04:17:24,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:17:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-12-22 04:17:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:17:24,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:24,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:24,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:24,869 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2020-12-22 04:17:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:24,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411974916] [2020-12-22 04:17:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:24,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411974916] [2020-12-22 04:17:24,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066337697] [2020-12-22 04:17:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:17:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:25,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:25,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:17:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171536925] [2020-12-22 04:17:25,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:25,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:25,195 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2020-12-22 04:17:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:25,464 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2020-12-22 04:17:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:17:25,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:17:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:25,466 INFO L225 Difference]: With dead ends: 181 [2020-12-22 04:17:25,466 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 04:17:25,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:17:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 04:17:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-12-22 04:17:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:17:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2020-12-22 04:17:25,480 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2020-12-22 04:17:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:25,480 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2020-12-22 04:17:25,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2020-12-22 04:17:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:17:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:25,482 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:25,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:25,696 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2020-12-22 04:17:25,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:25,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389743408] [2020-12-22 04:17:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:25,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389743408] [2020-12-22 04:17:25,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024520103] [2020-12-22 04:17:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:17:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:25,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:25,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:17:25,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259968327] [2020-12-22 04:17:25,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:25,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:25,926 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2020-12-22 04:17:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:26,100 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-22 04:17:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:17:26,101 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-22 04:17:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:26,102 INFO L225 Difference]: With dead ends: 206 [2020-12-22 04:17:26,102 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 04:17:26,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:17:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 04:17:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2020-12-22 04:17:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 04:17:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-12-22 04:17:26,117 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2020-12-22 04:17:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:26,118 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-12-22 04:17:26,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-12-22 04:17:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:17:26,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:26,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:26,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:26,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2020-12-22 04:17:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:26,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161695220] [2020-12-22 04:17:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:26,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161695220] [2020-12-22 04:17:26,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270040583] [2020-12-22 04:17:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:17:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:26,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:17:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:26,989 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2020-12-22 04:17:26,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:27,008 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:27,017 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:27,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:32 [2020-12-22 04:17:27,132 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:27,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 40 [2020-12-22 04:17:27,138 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:27,170 INFO L625 ElimStorePlain]: treesize reduction 24, result has 57.1 percent of original size [2020-12-22 04:17:27,174 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:27,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:32 [2020-12-22 04:17:27,415 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:27,416 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 121 [2020-12-22 04:17:27,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:17:27,425 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 04:17:27,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:27,434 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:27,509 INFO L625 ElimStorePlain]: treesize reduction 51, result has 50.5 percent of original size [2020-12-22 04:17:27,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:27,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:52 [2020-12-22 04:17:27,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:27,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:17:27,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:17:27,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:17:27,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:17:27,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:17:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:27,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:27,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-22 04:17:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558485294] [2020-12-22 04:17:27,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:17:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:17:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:17:27,977 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2020-12-22 04:17:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:30,813 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2020-12-22 04:17:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:17:30,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-22 04:17:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:30,818 INFO L225 Difference]: With dead ends: 252 [2020-12-22 04:17:30,818 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 04:17:30,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:17:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 04:17:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2020-12-22 04:17:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:17:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-12-22 04:17:30,867 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2020-12-22 04:17:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:30,870 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-12-22 04:17:30,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:17:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-12-22 04:17:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:17:30,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:30,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:31,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:17:31,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:31,075 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2020-12-22 04:17:31,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:31,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853522919] [2020-12-22 04:17:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:31,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853522919] [2020-12-22 04:17:31,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658218431] [2020-12-22 04:17:31,285 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 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 04:17:31,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:17:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:31,404 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 04:17:31,405 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:31,412 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:31,414 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:31,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-22 04:17:31,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:31,465 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2020-12-22 04:17:31,468 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:31,477 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:31,479 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:31,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:18 [2020-12-22 04:17:31,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:31,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:31,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:31,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-22 04:17:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050424241] [2020-12-22 04:17:31,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:31,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:31,539 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 10 states. [2020-12-22 04:17:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:31,822 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2020-12-22 04:17:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:17:31,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-12-22 04:17:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:31,824 INFO L225 Difference]: With dead ends: 159 [2020-12-22 04:17:31,824 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 04:17:31,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:17:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 04:17:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2020-12-22 04:17:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:17:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-12-22 04:17:31,842 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2020-12-22 04:17:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:31,842 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-12-22 04:17:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-12-22 04:17:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:17:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:31,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:32,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:32,059 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2020-12-22 04:17:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:32,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329641873] [2020-12-22 04:17:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:32,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329641873] [2020-12-22 04:17:32,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655777338] [2020-12-22 04:17:32,176 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:32,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:17:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:32,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:32,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 04:17:32,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65224785] [2020-12-22 04:17:32,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:17:32,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:17:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:17:32,344 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 10 states. [2020-12-22 04:17:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:32,595 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-12-22 04:17:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:17:32,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-22 04:17:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:32,598 INFO L225 Difference]: With dead ends: 216 [2020-12-22 04:17:32,598 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 04:17:32,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:17:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 04:17:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2020-12-22 04:17:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 04:17:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-12-22 04:17:32,635 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2020-12-22 04:17:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:32,636 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-12-22 04:17:32,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:17:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-12-22 04:17:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:17:32,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:32,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:32,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:32,853 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:32,854 INFO L82 PathProgramCache]: Analyzing trace with hash 160714710, now seen corresponding path program 2 times [2020-12-22 04:17:32,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:32,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062048214] [2020-12-22 04:17:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 04:17:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062048214] [2020-12-22 04:17:32,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713250048] [2020-12-22 04:17:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:32,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:17:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 04:17:33,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:17:33,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 04:17:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514692587] [2020-12-22 04:17:33,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:17:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:17:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:33,038 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 4 states. [2020-12-22 04:17:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:33,117 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2020-12-22 04:17:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:33,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-22 04:17:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:33,121 INFO L225 Difference]: With dead ends: 246 [2020-12-22 04:17:33,121 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 04:17:33,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:17:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 04:17:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2020-12-22 04:17:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:17:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2020-12-22 04:17:33,142 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2020-12-22 04:17:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:33,142 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2020-12-22 04:17:33,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:17:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2020-12-22 04:17:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:17:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:33,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:33,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:17:33,358 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2020-12-22 04:17:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:33,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911638733] [2020-12-22 04:17:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:33,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911638733] [2020-12-22 04:17:33,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350589570] [2020-12-22 04:17:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:17:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:33,740 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 13 treesize of output 9 [2020-12-22 04:17:33,741 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:33,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:33,752 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:33,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-22 04:17:33,842 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:33,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:33,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:33,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:33,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 04:17:33,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860728993] [2020-12-22 04:17:33,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:17:33,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:17:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:17:33,874 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 15 states. [2020-12-22 04:17:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:34,371 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-12-22 04:17:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:17:34,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-22 04:17:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:34,373 INFO L225 Difference]: With dead ends: 183 [2020-12-22 04:17:34,373 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 04:17:34,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:17:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 04:17:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-12-22 04:17:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 04:17:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-12-22 04:17:34,391 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2020-12-22 04:17:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:34,391 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-12-22 04:17:34,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:17:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-12-22 04:17:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:17:34,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:34,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:34,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:34,606 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2020-12-22 04:17:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:34,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396829436] [2020-12-22 04:17:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:35,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396829436] [2020-12-22 04:17:35,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857787033] [2020-12-22 04:17:35,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:35,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:17:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:17:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:35,534 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2020-12-22 04:17:35,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:35,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:35,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:35,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:73 [2020-12-22 04:17:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:35,658 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:35,659 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 82 [2020-12-22 04:17:35,662 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:35,726 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.5 percent of original size [2020-12-22 04:17:35,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:35,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:81, output treesize:73 [2020-12-22 04:17:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:17:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,317 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-12-22 04:17:36,318 INFO L348 Elim1Store]: treesize reduction 16, result has 94.7 percent of original size [2020-12-22 04:17:36,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 82 treesize of output 335 [2020-12-22 04:17:36,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:36,331 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:36,422 INFO L625 ElimStorePlain]: treesize reduction 41, result has 68.5 percent of original size [2020-12-22 04:17:36,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:36,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:89 [2020-12-22 04:17:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:17:37,232 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2020-12-22 04:17:37,233 INFO L348 Elim1Store]: treesize reduction 14, result has 96.6 percent of original size [2020-12-22 04:17:37,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 87 treesize of output 452 [2020-12-22 04:17:37,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:17:37,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,247 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 04:17:37,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 04:17:37,251 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-22 04:17:37,251 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 04:17:37,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:37,254 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 04:17:37,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:37,266 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:37,407 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-12-22 04:17:37,407 INFO L625 ElimStorePlain]: treesize reduction 90, result has 54.5 percent of original size [2020-12-22 04:17:37,411 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:17:37,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-22 04:17:37,418 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:104, output treesize:108 [2020-12-22 04:17:37,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 04:17:37,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:37,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 04:17:38,380 WARN L197 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-22 04:17:38,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:39,088 WARN L197 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-12-22 04:17:39,810 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-22 04:17:39,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:40,570 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-12-22 04:17:40,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:40,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:40,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:17:40,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:17:40,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:17:40,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-22 04:17:40,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 14 disjuncts [2020-12-22 04:17:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:17:41,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:41,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2020-12-22 04:17:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894263667] [2020-12-22 04:17:41,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:17:41,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:17:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:17:41,079 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 29 states. [2020-12-22 04:17:41,976 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-12-22 04:17:44,333 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2020-12-22 04:17:44,537 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-12-22 04:17:44,698 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 04:17:44,929 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-12-22 04:17:45,218 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-12-22 04:17:45,588 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-12-22 04:17:45,755 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-12-22 04:17:46,151 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2020-12-22 04:17:48,395 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-22 04:17:48,827 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 83 [2020-12-22 04:17:49,248 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 04:17:49,919 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-12-22 04:17:50,151 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-22 04:17:50,646 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 84 [2020-12-22 04:17:50,978 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-12-22 04:17:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:50,980 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2020-12-22 04:17:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:17:50,980 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:17:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:50,981 INFO L225 Difference]: With dead ends: 186 [2020-12-22 04:17:50,982 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 04:17:50,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=515, Invalid=2136, Unknown=1, NotChecked=0, Total=2652 [2020-12-22 04:17:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 04:17:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-22 04:17:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 04:17:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2020-12-22 04:17:51,001 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2020-12-22 04:17:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:51,001 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2020-12-22 04:17:51,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:17:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2020-12-22 04:17:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:17:51,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:51,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:51,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:51,209 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2020-12-22 04:17:51,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:51,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089173869] [2020-12-22 04:17:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:17:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089173869] [2020-12-22 04:17:51,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:17:51,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:17:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644349181] [2020-12-22 04:17:51,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:17:51,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:17:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:17:51,253 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand 5 states. [2020-12-22 04:17:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:51,303 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-12-22 04:17:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:17:51,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-22 04:17:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:51,305 INFO L225 Difference]: With dead ends: 197 [2020-12-22 04:17:51,305 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 04:17:51,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 04:17:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 04:17:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-12-22 04:17:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 04:17:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2020-12-22 04:17:51,322 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2020-12-22 04:17:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:51,323 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2020-12-22 04:17:51,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:17:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2020-12-22 04:17:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:17:51,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:51,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:51,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 04:17:51,324 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2020-12-22 04:17:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:51,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801685992] [2020-12-22 04:17:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:51,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801685992] [2020-12-22 04:17:51,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399674251] [2020-12-22 04:17:51,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:51,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:51,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:17:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:17:51,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:51,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 04:17:51,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053136123] [2020-12-22 04:17:51,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:17:51,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:17:51,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:17:51,579 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2020-12-22 04:17:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:51,941 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2020-12-22 04:17:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:17:51,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-22 04:17:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:51,944 INFO L225 Difference]: With dead ends: 403 [2020-12-22 04:17:51,944 INFO L226 Difference]: Without dead ends: 298 [2020-12-22 04:17:51,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:17:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-22 04:17:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2020-12-22 04:17:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 04:17:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-12-22 04:17:51,974 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2020-12-22 04:17:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:51,975 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-12-22 04:17:51,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:17:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-12-22 04:17:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:17:51,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:51,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:52,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:17:52,191 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2020-12-22 04:17:52,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:52,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231917083] [2020-12-22 04:17:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:52,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231917083] [2020-12-22 04:17:52,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418836389] [2020-12-22 04:17:52,278 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:52,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:17:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:17:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:52,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:52,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 04:17:52,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345071367] [2020-12-22 04:17:52,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:17:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:17:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:17:52,440 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2020-12-22 04:17:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:17:52,815 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2020-12-22 04:17:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:17:52,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-12-22 04:17:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:17:52,818 INFO L225 Difference]: With dead ends: 487 [2020-12-22 04:17:52,818 INFO L226 Difference]: Without dead ends: 465 [2020-12-22 04:17:52,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:17:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-12-22 04:17:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2020-12-22 04:17:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-22 04:17:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2020-12-22 04:17:52,857 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2020-12-22 04:17:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:17:52,857 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2020-12-22 04:17:52,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:17:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2020-12-22 04:17:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:17:52,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:17:52,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:17:53,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:17:53,074 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:17:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:17:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2020-12-22 04:17:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:17:53,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418004264] [2020-12-22 04:17:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:17:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:17:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:17:53,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418004264] [2020-12-22 04:17:53,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689019513] [2020-12-22 04:17:53,707 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:17:53,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:17:53,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:17:53,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:17:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:17:53,818 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:53,819 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 31 [2020-12-22 04:17:53,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:53,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:53,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:53,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:32 [2020-12-22 04:17:54,029 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2020-12-22 04:17:54,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:54,051 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:46 [2020-12-22 04:17:54,294 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:54,294 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 100 [2020-12-22 04:17:54,297 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:17:54,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:54,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,376 INFO L625 ElimStorePlain]: treesize reduction 125, result has 35.2 percent of original size [2020-12-22 04:17:54,377 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:68 [2020-12-22 04:17:54,555 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:17:54,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 55 [2020-12-22 04:17:54,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:54,560 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:54,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:17:54,567 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 04:17:54,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,606 INFO L625 ElimStorePlain]: treesize reduction 26, result has 51.9 percent of original size [2020-12-22 04:17:54,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:17:54,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:12 [2020-12-22 04:17:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:17:54,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:17:54,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 04:17:54,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112248293] [2020-12-22 04:17:54,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:17:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:17:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:17:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:17:54,681 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 24 states. [2020-12-22 04:17:56,731 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 04:17:56,958 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 04:17:58,595 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 04:18:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:00,614 INFO L93 Difference]: Finished difference Result 858 states and 1076 transitions. [2020-12-22 04:18:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:18:00,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-12-22 04:18:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:00,619 INFO L225 Difference]: With dead ends: 858 [2020-12-22 04:18:00,619 INFO L226 Difference]: Without dead ends: 771 [2020-12-22 04:18:00,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=970, Invalid=6170, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:18:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-12-22 04:18:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 414. [2020-12-22 04:18:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-12-22 04:18:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2020-12-22 04:18:00,681 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 34 [2020-12-22 04:18:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:00,681 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2020-12-22 04:18:00,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:18:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2020-12-22 04:18:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:18:00,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:00,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:00,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:18:00,898 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2020-12-22 04:18:00,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:00,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421695689] [2020-12-22 04:18:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:01,521 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-12-22 04:18:01,644 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-12-22 04:18:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:18:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421695689] [2020-12-22 04:18:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235112558] [2020-12-22 04:18:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:02,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:18:02,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:18:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:18:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:03,003 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:03,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 31 [2020-12-22 04:18:03,006 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:03,034 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:48 [2020-12-22 04:18:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2020-12-22 04:18:03,110 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,141 INFO L625 ElimStorePlain]: treesize reduction 4, result has 92.3 percent of original size [2020-12-22 04:18:03,141 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:48 [2020-12-22 04:18:03,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,656 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-12-22 04:18:03,657 INFO L348 Elim1Store]: treesize reduction 8, result has 96.6 percent of original size [2020-12-22 04:18:03,658 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 259 [2020-12-22 04:18:03,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:03,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:03,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,717 INFO L625 ElimStorePlain]: treesize reduction 15, result has 80.5 percent of original size [2020-12-22 04:18:03,718 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 04:18:03,719 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:62 [2020-12-22 04:18:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:03,988 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:03,989 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:04,385 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-12-22 04:18:04,386 INFO L348 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2020-12-22 04:18:04,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 359 [2020-12-22 04:18:04,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:04,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:04,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:04,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:04,400 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:04,494 INFO L625 ElimStorePlain]: treesize reduction 67, result has 56.8 percent of original size [2020-12-22 04:18:04,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:04,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:88 [2020-12-22 04:18:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 04:18:04,830 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 04:18:05,101 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 04:18:05,102 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 04:18:05,102 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 452 [2020-12-22 04:18:05,125 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 04:18:05,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:05,128 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-22 04:18:05,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 04:18:05,129 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:18:05,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 04:18:05,249 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-12-22 04:18:05,250 INFO L625 ElimStorePlain]: treesize reduction 117, result has 46.8 percent of original size [2020-12-22 04:18:05,253 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 04:18:05,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:105, output treesize:103 [2020-12-22 04:18:15,362 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 04:18:19,533 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 04:18:25,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:18:25,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:25,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 04:18:25,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-22 04:18:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 04:18:25,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:25,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-12-22 04:18:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070055309] [2020-12-22 04:18:25,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:18:25,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:18:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=917, Unknown=6, NotChecked=0, Total=1056 [2020-12-22 04:18:25,957 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand 33 states. [2020-12-22 04:18:27,340 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-12-22 04:18:29,654 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-12-22 04:18:30,892 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-12-22 04:18:31,263 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-12-22 04:18:32,087 WARN L197 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-12-22 04:18:32,292 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 04:18:33,737 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 04:18:39,954 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-22 04:18:40,253 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-22 04:18:42,598 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-22 04:18:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:42,725 INFO L93 Difference]: Finished difference Result 476 states and 629 transitions. [2020-12-22 04:18:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:18:42,725 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-12-22 04:18:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:42,729 INFO L225 Difference]: With dead ends: 476 [2020-12-22 04:18:42,730 INFO L226 Difference]: Without dead ends: 438 [2020-12-22 04:18:42,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=500, Invalid=2464, Unknown=6, NotChecked=0, Total=2970 [2020-12-22 04:18:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-22 04:18:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 417. [2020-12-22 04:18:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-22 04:18:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 562 transitions. [2020-12-22 04:18:42,801 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 562 transitions. Word has length 37 [2020-12-22 04:18:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:42,801 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 562 transitions. [2020-12-22 04:18:42,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:18:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 562 transitions. [2020-12-22 04:18:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:18:42,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:42,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:43,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:43,018 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash 301030412, now seen corresponding path program 1 times [2020-12-22 04:18:43,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:43,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313329758] [2020-12-22 04:18:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:18:43,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313329758] [2020-12-22 04:18:43,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6985119] [2020-12-22 04:18:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:18:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:18:43,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:18:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:18:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:18:43,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:18:43,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-22 04:18:43,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250854163] [2020-12-22 04:18:43,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:18:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:18:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:18:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:18:43,327 INFO L87 Difference]: Start difference. First operand 417 states and 562 transitions. Second operand 13 states. [2020-12-22 04:18:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:18:43,824 INFO L93 Difference]: Finished difference Result 583 states and 765 transitions. [2020-12-22 04:18:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:18:43,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-22 04:18:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:18:43,828 INFO L225 Difference]: With dead ends: 583 [2020-12-22 04:18:43,829 INFO L226 Difference]: Without dead ends: 561 [2020-12-22 04:18:43,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:18:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-12-22 04:18:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 416. [2020-12-22 04:18:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-12-22 04:18:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 556 transitions. [2020-12-22 04:18:43,892 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 556 transitions. Word has length 37 [2020-12-22 04:18:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:18:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 556 transitions. [2020-12-22 04:18:43,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:18:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 556 transitions. [2020-12-22 04:18:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:18:43,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:18:43,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:18:44,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:18:44,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:18:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:18:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2020-12-22 04:18:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:18:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684511189] [2020-12-22 04:18:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:18:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:18:44,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:18:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:18:44,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:18:44,216 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:18:44,217 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:18:44,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 04:18:44,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:18:44 BoogieIcfgContainer [2020-12-22 04:18:44,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:18:44,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:18:44,285 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:18:44,285 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:18:44,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:17:22" (3/4) ... [2020-12-22 04:18:44,288 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:18:44,356 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/eureka_01-1.c-witness.graphml [2020-12-22 04:18:44,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:18:44,357 INFO L168 Benchmark]: Toolchain (without parser) took 83178.27 ms. Allocated memory was 169.9 MB in the beginning and 362.8 MB in the end (delta: 192.9 MB). Free memory was 145.8 MB in the beginning and 140.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 198.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,358 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:18:44,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.71 ms. Allocated memory is still 169.9 MB. Free memory was 145.5 MB in the beginning and 134.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 132.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,359 INFO L168 Benchmark]: Boogie Preprocessor took 39.08 ms. Allocated memory is still 169.9 MB. Free memory was 132.0 MB in the beginning and 130.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,359 INFO L168 Benchmark]: RCFGBuilder took 608.85 ms. Allocated memory is still 169.9 MB. Free memory was 130.4 MB in the beginning and 142.7 MB in the end (delta: -12.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,360 INFO L168 Benchmark]: TraceAbstraction took 82089.39 ms. Allocated memory was 169.9 MB in the beginning and 362.8 MB in the end (delta: 192.9 MB). Free memory was 142.2 MB in the beginning and 145.1 MB in the end (delta: -3.0 MB). Peak memory consumption was 190.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,360 INFO L168 Benchmark]: Witness Printer took 71.79 ms. Allocated memory is still 362.8 MB. Free memory was 145.1 MB in the beginning and 140.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:18:44,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 169.9 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 294.71 ms. Allocated memory is still 169.9 MB. Free memory was 145.5 MB in the beginning and 134.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 132.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.08 ms. Allocated memory is still 169.9 MB. Free memory was 132.0 MB in the beginning and 130.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 608.85 ms. Allocated memory is still 169.9 MB. Free memory was 130.4 MB in the beginning and 142.7 MB in the end (delta: -12.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82089.39 ms. Allocated memory was 169.9 MB in the beginning and 362.8 MB in the end (delta: 192.9 MB). Free memory was 142.2 MB in the beginning and 145.1 MB in the end (delta: -3.0 MB). Peak memory consumption was 190.0 MB. Max. memory is 8.0 GB. * Witness Printer took 71.79 ms. Allocated memory is still 362.8 MB. Free memory was 145.1 MB in the beginning and 140.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L12] reach_error() VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 81.8s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 38.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 623 SDtfs, 2529 SDslu, 3004 SDs, 0 SdLazy, 4189 SolverSat, 1196 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 768 GetRequests, 360 SyntacticMatches, 15 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4625 ImplicationChecksByTransitivity, 54.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=417occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 1361 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 36.0s InterpolantComputationTime, 957 NumberOfCodeBlocks, 954 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 886 ConstructedInterpolants, 64 QuantifiedInterpolants, 404374 SizeOfPredicates, 118 NumberOfNonLiveVariables, 3724 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 146/373 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...