/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:06:17,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:06:17,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:06:17,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:06:17,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:06:17,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:06:17,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:06:17,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:06:17,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:06:17,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:06:17,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:06:17,786 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:06:17,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:06:17,786 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:06:17,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:06:17,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:06:17,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:06:17,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:06:17,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:06:17,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:06:17,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:06:17,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:06:17,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:06:17,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:06:17,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:06:17,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:06:17,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:06:17,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:06:17,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:06:17,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:06:17,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:06:17,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:06:18,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:06:18,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:06:18,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:06:18,147 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:06:18,148 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:06:18,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-07-13 20:06:18,149 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-07-13 20:06:18,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:06:18,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:06:18,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:18,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:06:18,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:06:18,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:18,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:06:18,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:06:18,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:06:18,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/1) ... [2021-07-13 20:06:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:06:18,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:06:18,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:06:18,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:06:18,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (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 [2021-07-13 20:06:18,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:06:18,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:06:18,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:06:18,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:06:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:06:18,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:06:18,304 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:06:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:06:18,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:06:18,304 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:06:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:06:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:06:18,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:06:18,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:06:18,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:06:18,307 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:06:18,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:06:18,506 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:06:18,508 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:18 BoogieIcfgContainer [2021-07-13 20:06:18,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:06:18,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:06:18,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:06:18,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:06:18,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:18" (1/2) ... [2021-07-13 20:06:18,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e64b31 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:06:18, skipping insertion in model container [2021-07-13 20:06:18,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:18" (2/2) ... [2021-07-13 20:06:18,515 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-07-13 20:06:18,520 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:06:18,520 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:06:18,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:06:18,521 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:06:18,560 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:06:18,579 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:06:18,598 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:06:18,598 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:06:18,598 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:06:18,598 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:06:18,598 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:06:18,598 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:06:18,598 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:06:18,598 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:06:18,608 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-07-13 20:06:18,732 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:06:18,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:18,761 INFO L508 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] [2021-07-13 20:06:18,761 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1590059923, now seen corresponding path program 1 times [2021-07-13 20:06:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:18,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176801182] [2021-07-13 20:06:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:18,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176801182] [2021-07-13 20:06:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176801182] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:18,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:18,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998346717] [2021-07-13 20:06:18,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:18,964 INFO L87 Difference]: Start difference. First operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,047 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-07-13 20:06:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:06:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,072 INFO L225 Difference]: With dead ends: 912 [2021-07-13 20:06:19,072 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 20:06:19,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 20:06:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-07-13 20:06:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-07-13 20:06:19,169 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-07-13 20:06:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,170 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-07-13 20:06:19,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-07-13 20:06:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:06:19,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,174 INFO L508 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] [2021-07-13 20:06:19,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:06:19,175 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2041716967, now seen corresponding path program 2 times [2021-07-13 20:06:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936930952] [2021-07-13 20:06:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:19,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:19,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936930952] [2021-07-13 20:06:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936930952] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:06:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688673375] [2021-07-13 20:06:19,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:06:19,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:19,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:06:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:19,266 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,359 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-07-13 20:06:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:06:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:06:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,366 INFO L225 Difference]: With dead ends: 863 [2021-07-13 20:06:19,366 INFO L226 Difference]: Without dead ends: 671 [2021-07-13 20:06:19,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-13 20:06:19,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-07-13 20:06:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-07-13 20:06:19,393 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-07-13 20:06:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,393 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-07-13 20:06:19,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-07-13 20:06:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:19,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,398 INFO L508 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, 1, 1] [2021-07-13 20:06:19,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:06:19,398 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1345429901, now seen corresponding path program 1 times [2021-07-13 20:06:19,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483394916] [2021-07-13 20:06:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:19,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483394916] [2021-07-13 20:06:19,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483394916] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:19,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:19,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:19,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737848815] [2021-07-13 20:06:19,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:19,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:19,445 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,454 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-07-13 20:06:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,459 INFO L225 Difference]: With dead ends: 752 [2021-07-13 20:06:19,460 INFO L226 Difference]: Without dead ends: 752 [2021-07-13 20:06:19,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-07-13 20:06:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-07-13 20:06:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-07-13 20:06:19,482 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-07-13 20:06:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,483 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-07-13 20:06:19,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-07-13 20:06:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:19,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,486 INFO L508 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, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:19,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:06:19,486 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 125377968, now seen corresponding path program 1 times [2021-07-13 20:06:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978980480] [2021-07-13 20:06:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:19,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:19,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978980480] [2021-07-13 20:06:19,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978980480] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:19,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:19,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:19,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886140675] [2021-07-13 20:06:19,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:19,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:19,511 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,523 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-07-13 20:06:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,529 INFO L225 Difference]: With dead ends: 800 [2021-07-13 20:06:19,529 INFO L226 Difference]: Without dead ends: 774 [2021-07-13 20:06:19,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-07-13 20:06:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-07-13 20:06:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-07-13 20:06:19,555 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-07-13 20:06:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,556 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-07-13 20:06:19,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-07-13 20:06:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:06:19,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,559 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:19,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:06:19,559 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,560 INFO L82 PathProgramCache]: Analyzing trace with hash -308585039, now seen corresponding path program 1 times [2021-07-13 20:06:19,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049204287] [2021-07-13 20:06:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:19,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049204287] [2021-07-13 20:06:19,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049204287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:19,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920426608] [2021-07-13 20:06:19,846 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 [2021-07-13 20:06:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:20,233 INFO L388 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 11 treesize of output 7 [2021-07-13 20:06:20,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:20,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:20,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:20,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:20,339 INFO L388 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 11 treesize of output 7 [2021-07-13 20:06:20,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:20,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:20,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:20,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-13 20:06:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:20,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920426608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:20,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:20,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:06:20,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569509280] [2021-07-13 20:06:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:20,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:20,474 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:21,084 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-07-13 20:06:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:06:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:06:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:21,092 INFO L225 Difference]: With dead ends: 1455 [2021-07-13 20:06:21,092 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 20:06:21,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:06:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 20:06:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-07-13 20:06:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-07-13 20:06:21,120 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-07-13 20:06:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-07-13 20:06:21,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-07-13 20:06:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:21,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:21,124 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:21,348 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1659336041, now seen corresponding path program 2 times [2021-07-13 20:06:21,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730241741] [2021-07-13 20:06:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730241741] [2021-07-13 20:06:21,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730241741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136084971] [2021-07-13 20:06:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:21,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:06:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136084971] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:21,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:06:21,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-07-13 20:06:21,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922524460] [2021-07-13 20:06:21,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:06:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:21,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:06:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:21,570 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:21,599 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-07-13 20:06:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:06:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:06:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:21,615 INFO L225 Difference]: With dead ends: 2380 [2021-07-13 20:06:21,615 INFO L226 Difference]: Without dead ends: 2330 [2021-07-13 20:06:21,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-13 20:06:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-07-13 20:06:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-07-13 20:06:21,685 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-07-13 20:06:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:21,685 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-07-13 20:06:21,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-07-13 20:06:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:06:21,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:21,691 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:21,913 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 480818054, now seen corresponding path program 3 times [2021-07-13 20:06:21,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822195868] [2021-07-13 20:06:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:21,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822195868] [2021-07-13 20:06:21,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822195868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571711529] [2021-07-13 20:06:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:22,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:06:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:06:22,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571711529] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:22,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:06:22,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-07-13 20:06:22,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866673525] [2021-07-13 20:06:22,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:06:22,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:06:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:22,079 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:22,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:22,123 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-07-13 20:06:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:06:22,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:06:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:22,153 INFO L225 Difference]: With dead ends: 4845 [2021-07-13 20:06:22,153 INFO L226 Difference]: Without dead ends: 4554 [2021-07-13 20:06:22,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:06:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-07-13 20:06:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-07-13 20:06:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-07-13 20:06:22,287 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-07-13 20:06:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:22,287 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-07-13 20:06:22,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-07-13 20:06:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:22,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:22,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:22,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:22,523 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1559474053, now seen corresponding path program 4 times [2021-07-13 20:06:22,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:22,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715206032] [2021-07-13 20:06:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:06:23,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:23,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715206032] [2021-07-13 20:06:23,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715206032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:23,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203642646] [2021-07-13 20:06:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:23,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:23,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:23,655 INFO L388 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 31 treesize of output 19 [2021-07-13 20:06:23,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:23,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:23,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:23,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:06:23,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:23,760 INFO L388 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 25 treesize of output 13 [2021-07-13 20:06:23,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:23,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:23,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:23,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203642646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:23,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:23,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-13 20:06:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277958351] [2021-07-13 20:06:23,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:06:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:06:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:06:23,863 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:32,623 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-07-13 20:06:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-07-13 20:06:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:06:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:32,764 INFO L225 Difference]: With dead ends: 26830 [2021-07-13 20:06:32,764 INFO L226 Difference]: Without dead ends: 23098 [2021-07-13 20:06:32,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 7069.9ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-07-13 20:06:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-07-13 20:06:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-07-13 20:06:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-07-13 20:06:33,122 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-07-13 20:06:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:33,122 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-07-13 20:06:33,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-07-13 20:06:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:33,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:33,136 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:33,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:33,359 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1256079791, now seen corresponding path program 5 times [2021-07-13 20:06:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:33,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518914089] [2021-07-13 20:06:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:33,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518914089] [2021-07-13 20:06:33,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518914089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969409145] [2021-07-13 20:06:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:33,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:33,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:33,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:06:33,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:34,351 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:34,352 INFO L388 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 31 treesize of output 19 [2021-07-13 20:06:34,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:34,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:34,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:34,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:06:34,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:34,525 INFO L388 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 25 treesize of output 13 [2021-07-13 20:06:34,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:34,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:34,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:34,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:34,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969409145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:34,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:34,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:06:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981057583] [2021-07-13 20:06:34,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:06:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:06:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:34,629 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:38,756 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-07-13 20:06:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:06:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:06:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:38,917 INFO L225 Difference]: With dead ends: 28401 [2021-07-13 20:06:38,918 INFO L226 Difference]: Without dead ends: 27869 [2021-07-13 20:06:38,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 3264.4ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-07-13 20:06:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-07-13 20:06:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-07-13 20:06:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-07-13 20:06:39,413 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-07-13 20:06:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:39,414 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-07-13 20:06:39,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-07-13 20:06:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:39,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:39,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:39,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:06:39,655 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 748755985, now seen corresponding path program 6 times [2021-07-13 20:06:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930179813] [2021-07-13 20:06:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:40,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:40,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930179813] [2021-07-13 20:06:40,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930179813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:40,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941501749] [2021-07-13 20:06:40,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:40,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:40,519 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:40,519 INFO L388 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 29 treesize of output 17 [2021-07-13 20:06:40,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:40,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:40,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:40,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:06:40,676 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:40,677 INFO L388 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 25 treesize of output 13 [2021-07-13 20:06:40,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:40,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:40,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:40,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941501749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:40,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:40,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:06:40,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718295312] [2021-07-13 20:06:40,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:06:40,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:06:40,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:40,782 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:45,261 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-07-13 20:06:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:06:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:06:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:45,392 INFO L225 Difference]: With dead ends: 37756 [2021-07-13 20:06:45,392 INFO L226 Difference]: Without dead ends: 36886 [2021-07-13 20:06:45,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3598.5ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:06:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-07-13 20:06:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-07-13 20:06:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-07-13 20:06:45,891 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-07-13 20:06:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:45,891 INFO L482 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-07-13 20:06:45,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-07-13 20:06:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:45,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:45,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:46,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:46,129 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash -169323025, now seen corresponding path program 7 times [2021-07-13 20:06:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:46,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665519755] [2021-07-13 20:06:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:46,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665519755] [2021-07-13 20:06:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665519755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936383034] [2021-07-13 20:06:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:46,909 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:46,910 INFO L388 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 29 treesize of output 17 [2021-07-13 20:06:46,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:46,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:06:47,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:47,057 INFO L388 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 25 treesize of output 13 [2021-07-13 20:06:47,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:47,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936383034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:47,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:06:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260872951] [2021-07-13 20:06:47,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:06:47,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:06:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:47,143 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:52,487 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-07-13 20:06:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:06:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:06:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:52,619 INFO L225 Difference]: With dead ends: 47050 [2021-07-13 20:06:52,619 INFO L226 Difference]: Without dead ends: 45439 [2021-07-13 20:06:52,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 4265.2ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-07-13 20:06:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-07-13 20:06:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-07-13 20:06:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-07-13 20:06:53,182 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-07-13 20:06:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:53,182 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-07-13 20:06:53,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-07-13 20:06:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:53,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:53,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:53,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:53,413 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 137214661, now seen corresponding path program 8 times [2021-07-13 20:06:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:53,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43855581] [2021-07-13 20:06:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43855581] [2021-07-13 20:06:53,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43855581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363020682] [2021-07-13 20:06:53,765 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 [2021-07-13 20:06:53,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:54,194 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:54,195 INFO L388 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 31 treesize of output 19 [2021-07-13 20:06:54,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:54,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:54,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:54,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-13 20:06:54,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:06:54,322 INFO L388 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 25 treesize of output 13 [2021-07-13 20:06:54,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:54,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:54,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:54,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:06:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363020682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:54,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:54,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:06:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876414102] [2021-07-13 20:06:54,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:06:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:06:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:54,428 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:59,065 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-07-13 20:06:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:06:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:06:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:59,178 INFO L225 Difference]: With dead ends: 40863 [2021-07-13 20:06:59,178 INFO L226 Difference]: Without dead ends: 40043 [2021-07-13 20:06:59,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3406.8ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-07-13 20:06:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-07-13 20:06:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-07-13 20:06:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-07-13 20:06:59,762 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-07-13 20:06:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:59,763 INFO L482 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-07-13 20:06:59,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-07-13 20:06:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:06:59,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:59,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:59,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:06:59,996 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -780864349, now seen corresponding path program 9 times [2021-07-13 20:06:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897988184] [2021-07-13 20:06:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897988184] [2021-07-13 20:07:00,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897988184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134105668] [2021-07-13 20:07:00,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:00,727 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:00,728 INFO L388 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 31 treesize of output 19 [2021-07-13 20:07:00,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:00,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-07-13 20:07:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:00,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:00,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-13 20:07:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134105668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571239514] [2021-07-13 20:07:00,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:00,978 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,467 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-07-13 20:07:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:07:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:06,586 INFO L225 Difference]: With dead ends: 45280 [2021-07-13 20:07:06,586 INFO L226 Difference]: Without dead ends: 44360 [2021-07-13 20:07:06,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4409.7ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-07-13 20:07:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-07-13 20:07:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-07-13 20:07:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-07-13 20:07:07,042 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-07-13 20:07:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:07,043 INFO L482 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-07-13 20:07:07,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-07-13 20:07:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:07,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:07,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:07,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:07,277 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash -114430541, now seen corresponding path program 10 times [2021-07-13 20:07:07,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:07,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200119470] [2021-07-13 20:07:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:07,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200119470] [2021-07-13 20:07:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200119470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797669032] [2021-07-13 20:07:07,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:07,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:08,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:08,057 INFO L388 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 31 treesize of output 19 [2021-07-13 20:07:08,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:08,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:07:08,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:08,139 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:08,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:08,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:08,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797669032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:08,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673159165] [2021-07-13 20:07:08,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:08,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:08,220 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,569 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-07-13 20:07:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-13 20:07:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,686 INFO L225 Difference]: With dead ends: 40459 [2021-07-13 20:07:14,686 INFO L226 Difference]: Without dead ends: 39249 [2021-07-13 20:07:14,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4890.5ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-07-13 20:07:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-07-13 20:07:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-07-13 20:07:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-07-13 20:07:15,091 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-07-13 20:07:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,091 INFO L482 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-07-13 20:07:15,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-07-13 20:07:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:15,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:07:15,334 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,334 INFO L82 PathProgramCache]: Analyzing trace with hash -686560397, now seen corresponding path program 11 times [2021-07-13 20:07:15,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589682962] [2021-07-13 20:07:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589682962] [2021-07-13 20:07:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589682962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882208032] [2021-07-13 20:07:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:15,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:07:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:07:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:15,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:15,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:07:15,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:15,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-07-13 20:07:16,131 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:16,131 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:16,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:16,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:16,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882208032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:16,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352060082] [2021-07-13 20:07:16,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:16,293 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:20,212 INFO L93 Difference]: Finished difference Result 22347 states and 74432 transitions. [2021-07-13 20:07:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:07:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:20,264 INFO L225 Difference]: With dead ends: 22347 [2021-07-13 20:07:20,264 INFO L226 Difference]: Without dead ends: 22075 [2021-07-13 20:07:20,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2520.9ms TimeCoverageRelationStatistics Valid=1403, Invalid=7339, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:07:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2021-07-13 20:07:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 6570. [2021-07-13 20:07:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-07-13 20:07:20,508 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-07-13 20:07:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:20,508 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-07-13 20:07:20,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-07-13 20:07:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:20,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:20,524 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:20,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:07:20,737 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 263509385, now seen corresponding path program 12 times [2021-07-13 20:07:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:20,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630537697] [2021-07-13 20:07:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:20,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630537697] [2021-07-13 20:07:20,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630537697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292181434] [2021-07-13 20:07:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:21,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:07:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:21,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:21,322 INFO L388 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 29 treesize of output 17 [2021-07-13 20:07:21,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:21,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:07:21,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:21,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:21,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-13 20:07:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292181434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:21,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:21,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539944784] [2021-07-13 20:07:21,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:21,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:21,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:21,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:21,673 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:24,312 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-07-13 20:07:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:07:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:24,342 INFO L225 Difference]: With dead ends: 13093 [2021-07-13 20:07:24,342 INFO L226 Difference]: Without dead ends: 12613 [2021-07-13 20:07:24,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 2081.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:07:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-07-13 20:07:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-07-13 20:07:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-07-13 20:07:24,498 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-07-13 20:07:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:24,498 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-07-13 20:07:24,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-07-13 20:07:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:24,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:24,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:24,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:24,717 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash -243814421, now seen corresponding path program 13 times [2021-07-13 20:07:24,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:24,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718196969] [2021-07-13 20:07:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:25,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718196969] [2021-07-13 20:07:25,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718196969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369109256] [2021-07-13 20:07:25,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:25,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:25,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:25,376 INFO L388 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 29 treesize of output 17 [2021-07-13 20:07:25,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:25,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:07:25,565 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:25,565 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:25,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:25,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369109256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:25,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:25,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896381889] [2021-07-13 20:07:25,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:25,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:25,650 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:27,509 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-07-13 20:07:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:07:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:27,542 INFO L225 Difference]: With dead ends: 12931 [2021-07-13 20:07:27,542 INFO L226 Difference]: Without dead ends: 12631 [2021-07-13 20:07:27,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1468.1ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:07:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-07-13 20:07:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-07-13 20:07:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-07-13 20:07:27,698 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-07-13 20:07:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:27,699 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-07-13 20:07:27,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-07-13 20:07:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:27,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:27,713 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:27,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:07:27,929 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1161893431, now seen corresponding path program 14 times [2021-07-13 20:07:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:27,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995800777] [2021-07-13 20:07:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:28,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995800777] [2021-07-13 20:07:28,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995800777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162047737] [2021-07-13 20:07:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:28,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:28,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:28,610 INFO L388 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 29 treesize of output 17 [2021-07-13 20:07:28,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:07:28,779 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:28,779 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:28,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:28,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162047737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:28,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:28,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140660172] [2021-07-13 20:07:28,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:28,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:28,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:28,873 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:33,328 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-07-13 20:07:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:07:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:33,414 INFO L225 Difference]: With dead ends: 31575 [2021-07-13 20:07:33,414 INFO L226 Difference]: Without dead ends: 31013 [2021-07-13 20:07:33,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 3254.8ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:07:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-07-13 20:07:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-07-13 20:07:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-07-13 20:07:33,764 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-07-13 20:07:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:33,764 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-07-13 20:07:33,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-07-13 20:07:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:33,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:33,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:33,977 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1107000947, now seen corresponding path program 15 times [2021-07-13 20:07:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654694671] [2021-07-13 20:07:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654694671] [2021-07-13 20:07:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654694671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638541682] [2021-07-13 20:07:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:34,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:07:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:34,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:34,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:07:34,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-07-13 20:07:34,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:34,860 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:34,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:34,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:34,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638541682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:34,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:34,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098424311] [2021-07-13 20:07:34,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:34,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:34,967 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,180 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-07-13 20:07:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:07:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:41,275 INFO L225 Difference]: With dead ends: 35083 [2021-07-13 20:07:41,275 INFO L226 Difference]: Without dead ends: 34089 [2021-07-13 20:07:41,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 4648.4ms TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:07:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-07-13 20:07:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-07-13 20:07:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-07-13 20:07:41,607 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-07-13 20:07:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:41,607 INFO L482 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-07-13 20:07:41,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-07-13 20:07:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:41,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:41,622 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:41,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:07:41,827 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545757, now seen corresponding path program 16 times [2021-07-13 20:07:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:41,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312450757] [2021-07-13 20:07:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312450757] [2021-07-13 20:07:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312450757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27806254] [2021-07-13 20:07:42,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:42,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:42,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:42,751 INFO L388 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 31 treesize of output 19 [2021-07-13 20:07:42,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:42,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:07:42,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:42,830 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:42,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:42,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:42,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27806254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:42,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292206527] [2021-07-13 20:07:42,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:42,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:42,903 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:49,498 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-07-13 20:07:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-13 20:07:49,498 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:49,603 INFO L225 Difference]: With dead ends: 41800 [2021-07-13 20:07:49,603 INFO L226 Difference]: Without dead ends: 37404 [2021-07-13 20:07:49,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 5232.8ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-07-13 20:07:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-07-13 20:07:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-07-13 20:07:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-07-13 20:07:49,996 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-07-13 20:07:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:49,996 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-07-13 20:07:49,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-07-13 20:07:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:50,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:50,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:50,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:50,223 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -789276919, now seen corresponding path program 17 times [2021-07-13 20:07:50,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:50,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986122305] [2021-07-13 20:07:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986122305] [2021-07-13 20:07:50,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986122305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:50,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372017828] [2021-07-13 20:07:50,585 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:50,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:07:50,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:07:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:50,905 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:50,905 INFO L388 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 31 treesize of output 19 [2021-07-13 20:07:50,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:50,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:50,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:07:51,036 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:51,036 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:51,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:51,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:51,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:51,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372017828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:51,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091957666] [2021-07-13 20:07:51,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:51,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:51,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:51,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:51,135 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:54,871 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-07-13 20:07:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:07:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:07:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:54,963 INFO L225 Difference]: With dead ends: 33537 [2021-07-13 20:07:54,964 INFO L226 Difference]: Without dead ends: 33005 [2021-07-13 20:07:54,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2875.0ms TimeCoverageRelationStatistics Valid=2279, Invalid=12483, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:07:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-07-13 20:07:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-07-13 20:07:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-07-13 20:07:55,318 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-07-13 20:07:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:55,318 INFO L482 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-07-13 20:07:55,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-07-13 20:07:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:07:55,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:55,387 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:55,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:07:55,593 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1296600725, now seen corresponding path program 18 times [2021-07-13 20:07:55,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:55,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049943979] [2021-07-13 20:07:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:56,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049943979] [2021-07-13 20:07:56,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049943979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726327126] [2021-07-13 20:07:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:56,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:07:56,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:07:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:56,359 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:56,359 INFO L388 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 29 treesize of output 17 [2021-07-13 20:07:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:56,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:07:56,512 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:56,512 INFO L388 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 25 treesize of output 13 [2021-07-13 20:07:56,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:56,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:56,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:07:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726327126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:56,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:07:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240271295] [2021-07-13 20:07:56,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:56,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:56,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:56,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:56,601 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:01,423 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-07-13 20:08:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:08:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:01,546 INFO L225 Difference]: With dead ends: 42883 [2021-07-13 20:08:01,546 INFO L226 Difference]: Without dead ends: 41993 [2021-07-13 20:08:01,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3784.7ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-07-13 20:08:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-07-13 20:08:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-07-13 20:08:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-07-13 20:08:01,947 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-07-13 20:08:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:01,947 INFO L482 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-07-13 20:08:01,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-07-13 20:08:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:01,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:01,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:02,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:08:02,169 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2080287561, now seen corresponding path program 19 times [2021-07-13 20:08:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:02,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18713141] [2021-07-13 20:08:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:02,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:02,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18713141] [2021-07-13 20:08:02,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18713141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:02,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827683930] [2021-07-13 20:08:02,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:02,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:02,898 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:02,899 INFO L388 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 29 treesize of output 17 [2021-07-13 20:08:02,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:02,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:02,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:02,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:08:03,035 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:03,036 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:03,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:03,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:03,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827683930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:03,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:03,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701340139] [2021-07-13 20:08:03,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:03,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:03,108 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,187 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-07-13 20:08:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-13 20:08:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,424 INFO L225 Difference]: With dead ends: 48973 [2021-07-13 20:08:09,424 INFO L226 Difference]: Without dead ends: 47923 [2021-07-13 20:08:09,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4611.9ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-07-13 20:08:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-07-13 20:08:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-07-13 20:08:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-07-13 20:08:09,862 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-07-13 20:08:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,862 INFO L482 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-07-13 20:08:09,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-07-13 20:08:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:09,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:10,097 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1908142049, now seen corresponding path program 20 times [2021-07-13 20:08:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559713941] [2021-07-13 20:08:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:10,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:10,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559713941] [2021-07-13 20:08:10,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559713941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898312703] [2021-07-13 20:08:10,463 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:10,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:10,829 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:10,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:10,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-13 20:08:10,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:10,955 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:10,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:10,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:10,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898312703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:11,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000895390] [2021-07-13 20:08:11,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:11,028 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:15,584 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-07-13 20:08:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:08:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:15,716 INFO L225 Difference]: With dead ends: 45204 [2021-07-13 20:08:15,716 INFO L226 Difference]: Without dead ends: 44384 [2021-07-13 20:08:15,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3564.0ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-07-13 20:08:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-07-13 20:08:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-07-13 20:08:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-07-13 20:08:16,162 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-07-13 20:08:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:16,162 INFO L482 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-07-13 20:08:16,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-07-13 20:08:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:16,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:16,177 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:16,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:08:16,378 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1468746237, now seen corresponding path program 21 times [2021-07-13 20:08:16,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:16,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747589653] [2021-07-13 20:08:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:16,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747589653] [2021-07-13 20:08:16,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747589653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130649004] [2021-07-13 20:08:16,861 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:16,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:08:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:17,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:17,274 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:17,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:17,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:17,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:17,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-07-13 20:08:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:17,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:17,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:08:17,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:17,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:17,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:17,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-13 20:08:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:17,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130649004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:17,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:17,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:17,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605968563] [2021-07-13 20:08:17,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:17,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:17,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:17,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:17,517 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:23,596 INFO L93 Difference]: Finished difference Result 49923 states and 165734 transitions. [2021-07-13 20:08:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 20:08:23,597 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:23,736 INFO L225 Difference]: With dead ends: 49923 [2021-07-13 20:08:23,736 INFO L226 Difference]: Without dead ends: 49003 [2021-07-13 20:08:23,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4934.8ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-07-13 20:08:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49003 states. [2021-07-13 20:08:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49003 to 9032. [2021-07-13 20:08:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-07-13 20:08:24,198 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-07-13 20:08:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:24,198 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-07-13 20:08:24,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-07-13 20:08:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:24,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:24,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:24,413 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2135180045, now seen corresponding path program 22 times [2021-07-13 20:08:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458188523] [2021-07-13 20:08:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:24,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458188523] [2021-07-13 20:08:24,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458188523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146263359] [2021-07-13 20:08:24,919 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:24,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:24,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:24,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:25,395 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:25,396 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:25,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:25,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:08:25,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:25,471 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:25,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:25,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:25,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:25,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146263359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:25,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:25,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651804726] [2021-07-13 20:08:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:25,542 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,030 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-07-13 20:08:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-07-13 20:08:32,031 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,152 INFO L225 Difference]: With dead ends: 45046 [2021-07-13 20:08:32,152 INFO L226 Difference]: Without dead ends: 43836 [2021-07-13 20:08:32,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 5327.7ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-07-13 20:08:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-07-13 20:08:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-07-13 20:08:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-07-13 20:08:32,704 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-07-13 20:08:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,705 INFO L482 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-07-13 20:08:32,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-07-13 20:08:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:32,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:32,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:32,960 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1563050189, now seen corresponding path program 23 times [2021-07-13 20:08:32,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:32,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415904202] [2021-07-13 20:08:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415904202] [2021-07-13 20:08:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415904202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409671722] [2021-07-13 20:08:33,268 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:33,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:08:33,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:08:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:33,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:33,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:08:33,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-07-13 20:08:33,782 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:33,783 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:33,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:33,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:33,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409671722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:33,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:33,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743092661] [2021-07-13 20:08:33,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:33,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:33,870 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,151 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-07-13 20:08:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:08:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,207 INFO L225 Difference]: With dead ends: 23013 [2021-07-13 20:08:37,207 INFO L226 Difference]: Without dead ends: 22741 [2021-07-13 20:08:37,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2271.6ms TimeCoverageRelationStatistics Valid=1189, Invalid=6121, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:08:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-07-13 20:08:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-07-13 20:08:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-07-13 20:08:37,455 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-07-13 20:08:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,455 INFO L482 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-07-13 20:08:37,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-07-13 20:08:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:37,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,469 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:37,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:08:37,670 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1134360447, now seen corresponding path program 24 times [2021-07-13 20:08:37,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:37,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343066704] [2021-07-13 20:08:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:08:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343066704] [2021-07-13 20:08:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343066704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124762127] [2021-07-13 20:08:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:38,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:38,495 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:38,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:38,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:08:38,568 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:38,568 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:38,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:38,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124762127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:38,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-13 20:08:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469752490] [2021-07-13 20:08:38,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:38,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:38,695 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:45,354 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-07-13 20:08:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-07-13 20:08:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:45,443 INFO L225 Difference]: With dead ends: 35903 [2021-07-13 20:08:45,443 INFO L226 Difference]: Without dead ends: 31668 [2021-07-13 20:08:45,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 5311.9ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 20:08:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-07-13 20:08:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-07-13 20:08:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-07-13 20:08:45,835 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-07-13 20:08:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:45,835 INFO L482 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-07-13 20:08:45,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-07-13 20:08:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:45,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:45,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:46,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:46,050 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash -345053005, now seen corresponding path program 25 times [2021-07-13 20:08:46,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:46,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516359158] [2021-07-13 20:08:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:46,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516359158] [2021-07-13 20:08:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516359158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658068355] [2021-07-13 20:08:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:46,696 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:46,697 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:46,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:46,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:08:46,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:46,832 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:46,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:46,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:46,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:46,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658068355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:46,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:46,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:46,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010382590] [2021-07-13 20:08:46,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:46,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:46,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:46,904 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:51,698 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-07-13 20:08:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:08:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:51,795 INFO L225 Difference]: With dead ends: 36007 [2021-07-13 20:08:51,795 INFO L226 Difference]: Without dead ends: 35475 [2021-07-13 20:08:51,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 3272.8ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:08:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-07-13 20:08:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-07-13 20:08:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-07-13 20:08:52,165 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-07-13 20:08:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:52,165 INFO L482 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-07-13 20:08:52,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-07-13 20:08:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:52,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:52,181 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:52,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:08:52,382 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash -852376811, now seen corresponding path program 26 times [2021-07-13 20:08:52,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:52,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413796960] [2021-07-13 20:08:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:52,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:52,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413796960] [2021-07-13 20:08:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413796960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:52,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350593110] [2021-07-13 20:08:52,700 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:52,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:52,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:53,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:53,062 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:53,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:08:53,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:53,204 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:53,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:53,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350593110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:53,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399555186] [2021-07-13 20:08:53,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:53,276 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:57,632 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-07-13 20:08:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:08:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:08:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:57,727 INFO L225 Difference]: With dead ends: 34504 [2021-07-13 20:08:57,728 INFO L226 Difference]: Without dead ends: 34104 [2021-07-13 20:08:57,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3372.0ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:08:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-07-13 20:08:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-07-13 20:08:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-07-13 20:08:58,104 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-07-13 20:08:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:58,104 INFO L482 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-07-13 20:08:58,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-07-13 20:08:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:08:58,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:58,119 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:58,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:58,320 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:58,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1770455821, now seen corresponding path program 27 times [2021-07-13 20:08:58,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:58,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313754410] [2021-07-13 20:08:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:58,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:58,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313754410] [2021-07-13 20:08:58,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313754410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:58,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684144777] [2021-07-13 20:08:58,656 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:58,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:08:58,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:08:58,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:58,982 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:58,982 INFO L388 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 31 treesize of output 19 [2021-07-13 20:08:58,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:58,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:58,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:58,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-13 20:08:59,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:08:59,119 INFO L388 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 25 treesize of output 13 [2021-07-13 20:08:59,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:59,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:59,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:08:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:59,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684144777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:59,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:08:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480528877] [2021-07-13 20:08:59,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:59,193 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:04,831 INFO L93 Difference]: Finished difference Result 36651 states and 121809 transitions. [2021-07-13 20:09:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:09:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:04,935 INFO L225 Difference]: With dead ends: 36651 [2021-07-13 20:09:04,935 INFO L226 Difference]: Without dead ends: 36236 [2021-07-13 20:09:04,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 4180.1ms TimeCoverageRelationStatistics Valid=2681, Invalid=15141, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:09:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2021-07-13 20:09:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 9180. [2021-07-13 20:09:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-07-13 20:09:05,281 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-07-13 20:09:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:05,281 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-07-13 20:09:05,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-07-13 20:09:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:09:05,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:05,296 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:05,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:09:05,503 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1463918135, now seen corresponding path program 28 times [2021-07-13 20:09:05,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:05,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872535741] [2021-07-13 20:09:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:05,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:05,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872535741] [2021-07-13 20:09:05,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872535741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941818957] [2021-07-13 20:09:05,829 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:05,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:05,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:09:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:06,179 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:06,180 INFO L388 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 31 treesize of output 19 [2021-07-13 20:09:06,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:06,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-13 20:09:06,291 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:06,291 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:06,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:06,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:06,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:06,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941818957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:06,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:06,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:09:06,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245648921] [2021-07-13 20:09:06,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:09:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:06,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:09:06,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:09:06,363 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:10,581 INFO L93 Difference]: Finished difference Result 34096 states and 113371 transitions. [2021-07-13 20:09:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:09:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:10,670 INFO L225 Difference]: With dead ends: 34096 [2021-07-13 20:09:10,670 INFO L226 Difference]: Without dead ends: 33696 [2021-07-13 20:09:10,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 3141.1ms TimeCoverageRelationStatistics Valid=1870, Invalid=10340, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:09:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33696 states. [2021-07-13 20:09:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33696 to 9279. [2021-07-13 20:09:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.3040525975425736) internal successors, (30655), 9278 states have internal predecessors, (30655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30655 transitions. [2021-07-13 20:09:11,022 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30655 transitions. Word has length 44 [2021-07-13 20:09:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:11,023 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 30655 transitions. [2021-07-13 20:09:11,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30655 transitions. [2021-07-13 20:09:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:09:11,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:11,037 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:11,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:11,238 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1912970151, now seen corresponding path program 29 times [2021-07-13 20:09:11,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:11,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075384331] [2021-07-13 20:09:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:11,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075384331] [2021-07-13 20:09:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075384331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968544462] [2021-07-13 20:09:11,620 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:11,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:09:11,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:11,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:09:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:09:12,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:12,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:27 [2021-07-13 20:09:12,109 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:12,109 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:12,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:12,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:12,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968544462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:12,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:09:12,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315324964] [2021-07-13 20:09:12,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:09:12,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:09:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:09:12,183 INFO L87 Difference]: Start difference. First operand 9279 states and 30655 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:17,201 INFO L93 Difference]: Finished difference Result 35956 states and 119480 transitions. [2021-07-13 20:09:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:09:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:17,298 INFO L225 Difference]: With dead ends: 35956 [2021-07-13 20:09:17,298 INFO L226 Difference]: Without dead ends: 35541 [2021-07-13 20:09:17,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 3853.2ms TimeCoverageRelationStatistics Valid=2393, Invalid=13863, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:09:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35541 states. [2021-07-13 20:09:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35541 to 9180. [2021-07-13 20:09:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-07-13 20:09:17,658 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-07-13 20:09:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:17,658 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-07-13 20:09:17,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-07-13 20:09:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:09:17,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:17,673 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:17,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 20:09:17,873 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1715563337, now seen corresponding path program 30 times [2021-07-13 20:09:17,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:17,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904531628] [2021-07-13 20:09:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:18,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:18,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904531628] [2021-07-13 20:09:18,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904531628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:18,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935962080] [2021-07-13 20:09:18,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:18,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:09:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:18,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:09:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:18,785 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:18,786 INFO L388 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 31 treesize of output 19 [2021-07-13 20:09:18,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:18,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:09:18,888 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:18,888 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:18,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:18,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:18,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935962080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-13 20:09:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121429460] [2021-07-13 20:09:18,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:09:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:09:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:09:18,989 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:24,660 INFO L93 Difference]: Finished difference Result 32902 states and 109101 transitions. [2021-07-13 20:09:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:09:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:24,744 INFO L225 Difference]: With dead ends: 32902 [2021-07-13 20:09:24,744 INFO L226 Difference]: Without dead ends: 32417 [2021-07-13 20:09:24,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 4586.1ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-07-13 20:09:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32417 states. [2021-07-13 20:09:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32417 to 9018. [2021-07-13 20:09:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 3.301763335921038) internal successors, (29772), 9017 states have internal predecessors, (29772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 29772 transitions. [2021-07-13 20:09:25,059 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 29772 transitions. Word has length 44 [2021-07-13 20:09:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:25,060 INFO L482 AbstractCegarLoop]: Abstraction has 9018 states and 29772 transitions. [2021-07-13 20:09:25,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 29772 transitions. [2021-07-13 20:09:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:09:25,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:25,074 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:25,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:25,275 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 856011747, now seen corresponding path program 31 times [2021-07-13 20:09:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:25,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930892544] [2021-07-13 20:09:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:09:25,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:25,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930892544] [2021-07-13 20:09:25,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930892544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:25,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102243744] [2021-07-13 20:09:25,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:09:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:26,046 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:26,046 INFO L388 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 31 treesize of output 19 [2021-07-13 20:09:26,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:26,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:09:26,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:26,120 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:26,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:26,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:26,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:26,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102243744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:26,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:26,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-13 20:09:26,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506491562] [2021-07-13 20:09:26,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:09:26,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:09:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:09:26,201 INFO L87 Difference]: Start difference. First operand 9018 states and 29772 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:32,245 INFO L93 Difference]: Finished difference Result 32479 states and 108314 transitions. [2021-07-13 20:09:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-13 20:09:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:32,325 INFO L225 Difference]: With dead ends: 32479 [2021-07-13 20:09:32,325 INFO L226 Difference]: Without dead ends: 28654 [2021-07-13 20:09:32,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 4685.2ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-07-13 20:09:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28654 states. [2021-07-13 20:09:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28654 to 9358. [2021-07-13 20:09:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9358 states, 9357 states have (on average 3.2972106444373197) internal successors, (30852), 9357 states have internal predecessors, (30852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9358 states to 9358 states and 30852 transitions. [2021-07-13 20:09:32,614 INFO L78 Accepts]: Start accepts. Automaton has 9358 states and 30852 transitions. Word has length 44 [2021-07-13 20:09:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:32,614 INFO L482 AbstractCegarLoop]: Abstraction has 9358 states and 30852 transitions. [2021-07-13 20:09:32,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9358 states and 30852 transitions. [2021-07-13 20:09:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 20:09:32,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:32,630 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:32,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:32,836 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 218619737, now seen corresponding path program 32 times [2021-07-13 20:09:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:32,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689336957] [2021-07-13 20:09:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:09:33,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689336957] [2021-07-13 20:09:33,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689336957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62122488] [2021-07-13 20:09:33,165 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:33,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:33,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:09:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:33,600 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:33,600 INFO L388 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 31 treesize of output 19 [2021-07-13 20:09:33,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:33,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-13 20:09:33,682 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:33,682 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:33,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:33,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:33,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:33,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62122488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-13 20:09:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065537800] [2021-07-13 20:09:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:09:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:09:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:09:33,755 INFO L87 Difference]: Start difference. First operand 9358 states and 30852 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,038 INFO L93 Difference]: Finished difference Result 35967 states and 119998 transitions. [2021-07-13 20:09:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-13 20:09:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 20:09:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:40,130 INFO L225 Difference]: With dead ends: 35967 [2021-07-13 20:09:40,130 INFO L226 Difference]: Without dead ends: 33259 [2021-07-13 20:09:40,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 4980.0ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-07-13 20:09:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2021-07-13 20:09:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 9428. [2021-07-13 20:09:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.294049008168028) internal successors, (31053), 9427 states have internal predecessors, (31053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 31053 transitions. [2021-07-13 20:09:40,472 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 31053 transitions. Word has length 44 [2021-07-13 20:09:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:40,472 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 31053 transitions. [2021-07-13 20:09:40,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 31053 transitions. [2021-07-13 20:09:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:40,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:40,489 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2021-07-13 20:09:40,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 20:09:40,693 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1309223083, now seen corresponding path program 33 times [2021-07-13 20:09:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:40,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110976965] [2021-07-13 20:09:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:40,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110976965] [2021-07-13 20:09:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110976965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005603360] [2021-07-13 20:09:40,719 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:40,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:09:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:09:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:09:40,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005603360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:40,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:40,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:09:40,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367410041] [2021-07-13 20:09:40,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:09:40,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:09:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:09:40,829 INFO L87 Difference]: Start difference. First operand 9428 states and 31053 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,890 INFO L93 Difference]: Finished difference Result 14357 states and 47370 transitions. [2021-07-13 20:09:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:09:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:40,923 INFO L225 Difference]: With dead ends: 14357 [2021-07-13 20:09:40,923 INFO L226 Difference]: Without dead ends: 14153 [2021-07-13 20:09:40,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:09:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-07-13 20:09:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 10944. [2021-07-13 20:09:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 3.3225806451612905) internal successors, (36359), 10943 states have internal predecessors, (36359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 36359 transitions. [2021-07-13 20:09:41,133 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 36359 transitions. Word has length 47 [2021-07-13 20:09:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:41,133 INFO L482 AbstractCegarLoop]: Abstraction has 10944 states and 36359 transitions. [2021-07-13 20:09:41,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 36359 transitions. [2021-07-13 20:09:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:41,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:41,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2021-07-13 20:09:41,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:41,352 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:41,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2079845064, now seen corresponding path program 34 times [2021-07-13 20:09:41,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:41,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291430573] [2021-07-13 20:09:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:41,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291430573] [2021-07-13 20:09:41,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291430573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986884726] [2021-07-13 20:09:41,647 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:41,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:42,061 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:42,062 INFO L388 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 29 treesize of output 17 [2021-07-13 20:09:42,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:42,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:42,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:42,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:09:42,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:42,218 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:42,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:42,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:42,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:42,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:42,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986884726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:42,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:42,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:09:42,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141752915] [2021-07-13 20:09:42,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:42,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:42,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:42,298 INFO L87 Difference]: Start difference. First operand 10944 states and 36359 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:44,523 INFO L93 Difference]: Finished difference Result 26668 states and 88897 transitions. [2021-07-13 20:09:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:09:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:44,597 INFO L225 Difference]: With dead ends: 26668 [2021-07-13 20:09:44,597 INFO L226 Difference]: Without dead ends: 26368 [2021-07-13 20:09:44,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1867.1ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:09:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26368 states. [2021-07-13 20:09:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26368 to 11105. [2021-07-13 20:09:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11104 states have (on average 3.3218659942363113) internal successors, (36886), 11104 states have internal predecessors, (36886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 36886 transitions. [2021-07-13 20:09:44,903 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 36886 transitions. Word has length 47 [2021-07-13 20:09:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:44,903 INFO L482 AbstractCegarLoop]: Abstraction has 11105 states and 36886 transitions. [2021-07-13 20:09:44,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 36886 transitions. [2021-07-13 20:09:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:44,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:44,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2021-07-13 20:09:45,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 20:09:45,122 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1161766054, now seen corresponding path program 35 times [2021-07-13 20:09:45,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047546076] [2021-07-13 20:09:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:45,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:45,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047546076] [2021-07-13 20:09:45,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047546076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961597971] [2021-07-13 20:09:45,489 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:45,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:09:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:45,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:45,846 INFO L388 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 29 treesize of output 17 [2021-07-13 20:09:45,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:45,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:09:45,986 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:45,986 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:45,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:45,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:45,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961597971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:46,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:09:46,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966082439] [2021-07-13 20:09:46,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:46,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:46,060 INFO L87 Difference]: Start difference. First operand 11105 states and 36886 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:49,096 INFO L93 Difference]: Finished difference Result 32478 states and 107950 transitions. [2021-07-13 20:09:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:09:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:49,187 INFO L225 Difference]: With dead ends: 32478 [2021-07-13 20:09:49,188 INFO L226 Difference]: Without dead ends: 32178 [2021-07-13 20:09:49,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2490.1ms TimeCoverageRelationStatistics Valid=1265, Invalid=7477, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:09:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2021-07-13 20:09:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 10959. [2021-07-13 20:09:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10958 states have (on average 3.322139076473809) internal successors, (36404), 10958 states have internal predecessors, (36404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 36404 transitions. [2021-07-13 20:09:49,547 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 36404 transitions. Word has length 47 [2021-07-13 20:09:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:49,547 INFO L482 AbstractCegarLoop]: Abstraction has 10959 states and 36404 transitions. [2021-07-13 20:09:49,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 36404 transitions. [2021-07-13 20:09:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:49,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:49,566 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2021-07-13 20:09:49,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:09:49,767 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1559125806, now seen corresponding path program 36 times [2021-07-13 20:09:49,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:49,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549284185] [2021-07-13 20:09:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:50,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549284185] [2021-07-13 20:09:50,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549284185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355883909] [2021-07-13 20:09:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:09:50,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:50,479 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:50,479 INFO L388 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 29 treesize of output 17 [2021-07-13 20:09:50,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:50,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:09:50,619 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:50,620 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:50,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:50,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355883909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:50,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:09:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204970583] [2021-07-13 20:09:50,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:50,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:50,708 INFO L87 Difference]: Start difference. First operand 10959 states and 36404 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:52,981 INFO L93 Difference]: Finished difference Result 26320 states and 87742 transitions. [2021-07-13 20:09:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:09:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:53,054 INFO L225 Difference]: With dead ends: 26320 [2021-07-13 20:09:53,054 INFO L226 Difference]: Without dead ends: 26020 [2021-07-13 20:09:53,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1823.5ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:09:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2021-07-13 20:09:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 10970. [2021-07-13 20:09:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 3.322271857051691) internal successors, (36442), 10969 states have internal predecessors, (36442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 36442 transitions. [2021-07-13 20:09:53,359 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 36442 transitions. Word has length 47 [2021-07-13 20:09:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:53,360 INFO L482 AbstractCegarLoop]: Abstraction has 10970 states and 36442 transitions. [2021-07-13 20:09:53,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 36442 transitions. [2021-07-13 20:09:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:09:53,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:53,377 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2021-07-13 20:09:53,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:09:53,578 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 641046796, now seen corresponding path program 37 times [2021-07-13 20:09:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603414794] [2021-07-13 20:09:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603414794] [2021-07-13 20:09:53,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603414794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708166739] [2021-07-13 20:09:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:09:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:54,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:54,299 INFO L388 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 29 treesize of output 17 [2021-07-13 20:09:54,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:54,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:54,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:54,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-13 20:09:54,432 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:54,433 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:54,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:54,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:54,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:54,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:54,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708166739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:54,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:54,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:09:54,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281294810] [2021-07-13 20:09:54,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:54,505 INFO L87 Difference]: Start difference. First operand 10970 states and 36442 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:57,470 INFO L93 Difference]: Finished difference Result 31704 states and 105322 transitions. [2021-07-13 20:09:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:09:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:09:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:57,553 INFO L225 Difference]: With dead ends: 31704 [2021-07-13 20:09:57,554 INFO L226 Difference]: Without dead ends: 31404 [2021-07-13 20:09:57,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2392.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:09:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2021-07-13 20:09:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 10809. [2021-07-13 20:09:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 3.3230014803849) internal successors, (35915), 10808 states have internal predecessors, (35915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 35915 transitions. [2021-07-13 20:09:57,955 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 35915 transitions. Word has length 47 [2021-07-13 20:09:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:57,955 INFO L482 AbstractCegarLoop]: Abstraction has 10809 states and 35915 transitions. [2021-07-13 20:09:57,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 35915 transitions. [2021-07-13 20:09:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:09:57,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:57,972 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:09:58,173 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -590498608, now seen corresponding path program 38 times [2021-07-13 20:09:58,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281168561] [2021-07-13 20:09:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:09:58,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281168561] [2021-07-13 20:09:58,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281168561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514573575] [2021-07-13 20:09:58,197 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:58,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:09:58,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:09:58,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514573575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:58,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:09:58,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046222852] [2021-07-13 20:09:58,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:09:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:09:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:09:58,287 INFO L87 Difference]: Start difference. First operand 10809 states and 35915 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:58,361 INFO L93 Difference]: Finished difference Result 18453 states and 61519 transitions. [2021-07-13 20:09:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:09:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:09:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:58,405 INFO L225 Difference]: With dead ends: 18453 [2021-07-13 20:09:58,405 INFO L226 Difference]: Without dead ends: 17839 [2021-07-13 20:09:58,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:09:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2021-07-13 20:09:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 12699. [2021-07-13 20:09:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12699 states, 12698 states have (on average 3.361946763269806) internal successors, (42690), 12698 states have internal predecessors, (42690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12699 states to 12699 states and 42690 transitions. [2021-07-13 20:09:58,668 INFO L78 Accepts]: Start accepts. Automaton has 12699 states and 42690 transitions. Word has length 51 [2021-07-13 20:09:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:58,668 INFO L482 AbstractCegarLoop]: Abstraction has 12699 states and 42690 transitions. [2021-07-13 20:09:58,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 12699 states and 42690 transitions. [2021-07-13 20:09:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:09:58,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:58,690 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,891 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1803464833, now seen corresponding path program 39 times [2021-07-13 20:09:58,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498439495] [2021-07-13 20:09:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498439495] [2021-07-13 20:09:59,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498439495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568634857] [2021-07-13 20:09:59,259 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:59,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:09:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:59,657 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:09:59,657 INFO L388 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 35 treesize of output 19 [2021-07-13 20:09:59,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:29 [2021-07-13 20:09:59,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:09:59,829 INFO L388 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 25 treesize of output 13 [2021-07-13 20:09:59,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:09:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568634857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:59,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:09:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870970670] [2021-07-13 20:09:59,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:59,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:59,903 INFO L87 Difference]: Start difference. First operand 12699 states and 42690 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:08,021 INFO L93 Difference]: Finished difference Result 86229 states and 293816 transitions. [2021-07-13 20:10:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-07-13 20:10:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:10:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:08,315 INFO L225 Difference]: With dead ends: 86229 [2021-07-13 20:10:08,315 INFO L226 Difference]: Without dead ends: 84335 [2021-07-13 20:10:08,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 6010.6ms TimeCoverageRelationStatistics Valid=5140, Invalid=40442, Unknown=0, NotChecked=0, Total=45582 [2021-07-13 20:10:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84335 states. [2021-07-13 20:10:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84335 to 13212. [2021-07-13 20:10:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 3.3770342896071455) internal successors, (44614), 13211 states have internal predecessors, (44614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 44614 transitions. [2021-07-13 20:10:09,550 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 44614 transitions. Word has length 51 [2021-07-13 20:10:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:09,550 INFO L482 AbstractCegarLoop]: Abstraction has 13212 states and 44614 transitions. [2021-07-13 20:10:09,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 44614 transitions. [2021-07-13 20:10:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:10:09,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:09,574 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-07-13 20:10:09,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:09,775 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash -746735621, now seen corresponding path program 40 times [2021-07-13 20:10:09,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:09,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487900424] [2021-07-13 20:10:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487900424] [2021-07-13 20:10:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487900424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367244329] [2021-07-13 20:10:10,187 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:10,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:10,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:10,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:10:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:10,631 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:10,631 INFO L388 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 35 treesize of output 19 [2021-07-13 20:10:10,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-07-13 20:10:10,899 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:10,899 INFO L388 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 25 treesize of output 13 [2021-07-13 20:10:10,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-13 20:10:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367244329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:10,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-13 20:10:10,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058806356] [2021-07-13 20:10:10,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:10,979 INFO L87 Difference]: Start difference. First operand 13212 states and 44614 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,557 INFO L93 Difference]: Finished difference Result 80772 states and 276597 transitions. [2021-07-13 20:10:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-07-13 20:10:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:10:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,844 INFO L225 Difference]: With dead ends: 80772 [2021-07-13 20:10:18,844 INFO L226 Difference]: Without dead ends: 78736 [2021-07-13 20:10:18,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5876.4ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-07-13 20:10:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2021-07-13 20:10:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 13623. [2021-07-13 20:10:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13622 states have (on average 3.3828365878725593) internal successors, (46081), 13622 states have internal predecessors, (46081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 46081 transitions. [2021-07-13 20:10:20,088 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 46081 transitions. Word has length 51 [2021-07-13 20:10:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:20,088 INFO L482 AbstractCegarLoop]: Abstraction has 13623 states and 46081 transitions. [2021-07-13 20:10:20,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 46081 transitions. [2021-07-13 20:10:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:20,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:20,117 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:20,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:20,318 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash 643422605, now seen corresponding path program 41 times [2021-07-13 20:10:20,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:20,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150659203] [2021-07-13 20:10:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:10:20,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150659203] [2021-07-13 20:10:20,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150659203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740552984] [2021-07-13 20:10:20,829 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:20,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:10:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:10:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:21,584 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:10:21,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:10:21,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:21,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:42 [2021-07-13 20:10:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:21,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:10:21,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:21,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:21,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-13 20:10:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740552984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:21,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:21,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-07-13 20:10:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566557323] [2021-07-13 20:10:21,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:10:21,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:10:21,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:10:21,791 INFO L87 Difference]: Start difference. First operand 13623 states and 46081 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:33,776 INFO L93 Difference]: Finished difference Result 92840 states and 316083 transitions. [2021-07-13 20:10:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-07-13 20:10:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:34,078 INFO L225 Difference]: With dead ends: 92840 [2021-07-13 20:10:34,078 INFO L226 Difference]: Without dead ends: 88224 [2021-07-13 20:10:34,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21094 ImplicationChecksByTransitivity, 9431.3ms TimeCoverageRelationStatistics Valid=5822, Invalid=46848, Unknown=0, NotChecked=0, Total=52670 [2021-07-13 20:10:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88224 states. [2021-07-13 20:10:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88224 to 14423. [2021-07-13 20:10:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 14422 states have (on average 3.370891693246429) internal successors, (48615), 14422 states have internal predecessors, (48615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 48615 transitions. [2021-07-13 20:10:35,341 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 48615 transitions. Word has length 54 [2021-07-13 20:10:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 14423 states and 48615 transitions. [2021-07-13 20:10:35,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 48615 transitions. [2021-07-13 20:10:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:35,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:35,366 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:35,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 20:10:35,567 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1581400071, now seen corresponding path program 42 times [2021-07-13 20:10:35,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:35,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072579998] [2021-07-13 20:10:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:10:36,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072579998] [2021-07-13 20:10:36,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072579998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:36,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052571817] [2021-07-13 20:10:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:36,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:10:36,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:10:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:36,713 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:10:36,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:10:36,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:36,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:36,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:36,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:10:36,887 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:10:36,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:10:36,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:36,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:36,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:36,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:10:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052571817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:36,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:36,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:10:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391878346] [2021-07-13 20:10:36,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:10:36,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:10:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:10:36,968 INFO L87 Difference]: Start difference. First operand 14423 states and 48615 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:47,596 INFO L93 Difference]: Finished difference Result 91747 states and 309740 transitions. [2021-07-13 20:10:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-07-13 20:10:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:10:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:47,913 INFO L225 Difference]: With dead ends: 91747 [2021-07-13 20:10:47,913 INFO L226 Difference]: Without dead ends: 90897 [2021-07-13 20:10:47,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 8389.4ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-07-13 20:10:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90897 states. [2021-07-13 20:10:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90897 to 15287. [2021-07-13 20:10:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15286 states have (on average 3.3639931963888525) internal successors, (51422), 15286 states have internal predecessors, (51422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 51422 transitions. [2021-07-13 20:10:49,215 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 51422 transitions. Word has length 54 [2021-07-13 20:10:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 15287 states and 51422 transitions. [2021-07-13 20:10:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 51422 transitions. [2021-07-13 20:10:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:10:49,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:49,240 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:49,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,441 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2088723877, now seen corresponding path program 43 times [2021-07-13 20:10:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118195969] [2021-07-13 20:10:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:10:49,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118195969] [2021-07-13 20:10:49,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118195969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294229080] [2021-07-13 20:10:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:10:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:50,643 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:10:50,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:10:50,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:50,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:10:50,836 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:10:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:10:50,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:50,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:50,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:10:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:50,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294229080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:50,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:50,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:10:50,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884495039] [2021-07-13 20:10:50,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:10:50,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:10:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:10:50,928 INFO L87 Difference]: Start difference. First operand 15287 states and 51422 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:03,374 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-07-13 20:11:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:04,009 INFO L93 Difference]: Finished difference Result 101039 states and 340837 transitions. [2021-07-13 20:11:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-07-13 20:11:04,009 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:04,358 INFO L225 Difference]: With dead ends: 101039 [2021-07-13 20:11:04,358 INFO L226 Difference]: Without dead ends: 100149 [2021-07-13 20:11:04,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25131 ImplicationChecksByTransitivity, 10465.2ms TimeCoverageRelationStatistics Valid=6462, Invalid=56288, Unknown=0, NotChecked=0, Total=62750 [2021-07-13 20:11:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100149 states. [2021-07-13 20:11:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100149 to 15370. [2021-07-13 20:11:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 15369 states have (on average 3.364695165593077) internal successors, (51712), 15369 states have internal predecessors, (51712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 51712 transitions. [2021-07-13 20:11:05,654 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 51712 transitions. Word has length 54 [2021-07-13 20:11:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:05,655 INFO L482 AbstractCegarLoop]: Abstraction has 15370 states and 51712 transitions. [2021-07-13 20:11:05,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 51712 transitions. [2021-07-13 20:11:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:05,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:05,681 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:05,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:11:05,887 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1288164409, now seen corresponding path program 44 times [2021-07-13 20:11:05,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:05,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128748330] [2021-07-13 20:11:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:11:06,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:06,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128748330] [2021-07-13 20:11:06,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128748330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:06,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988888551] [2021-07-13 20:11:06,248 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:06,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:11:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:06,883 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:06,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:11:06,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:06,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:06,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:06,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:11:07,055 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:11:07,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:07,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:11:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988888551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:07,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:07,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:11:07,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138026425] [2021-07-13 20:11:07,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:07,139 INFO L87 Difference]: Start difference. First operand 15370 states and 51712 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:23,354 INFO L93 Difference]: Finished difference Result 124978 states and 424154 transitions. [2021-07-13 20:11:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-07-13 20:11:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:24,067 INFO L225 Difference]: With dead ends: 124978 [2021-07-13 20:11:24,067 INFO L226 Difference]: Without dead ends: 121408 [2021-07-13 20:11:24,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 12564.6ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-07-13 20:11:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121408 states. [2021-07-13 20:11:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121408 to 17376. [2021-07-13 20:11:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17375 states have (on average 3.3524028776978416) internal successors, (58248), 17375 states have internal predecessors, (58248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 58248 transitions. [2021-07-13 20:11:25,378 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 58248 transitions. Word has length 54 [2021-07-13 20:11:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:25,378 INFO L482 AbstractCegarLoop]: Abstraction has 17376 states and 58248 transitions. [2021-07-13 20:11:25,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 58248 transitions. [2021-07-13 20:11:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:25,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:25,408 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:25,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:11:25,608 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1594702095, now seen corresponding path program 45 times [2021-07-13 20:11:25,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:25,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398943855] [2021-07-13 20:11:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:11:26,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:26,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398943855] [2021-07-13 20:11:26,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398943855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576085120] [2021-07-13 20:11:26,169 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:11:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:11:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:26,880 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:26,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:11:26,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:26,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:11:27,019 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:11:27,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:27,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:27,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:11:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:27,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576085120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:27,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:27,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:11:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178319939] [2021-07-13 20:11:27,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:27,121 INFO L87 Difference]: Start difference. First operand 17376 states and 58248 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:39,571 INFO L93 Difference]: Finished difference Result 100564 states and 339046 transitions. [2021-07-13 20:11:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-07-13 20:11:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:40,115 INFO L225 Difference]: With dead ends: 100564 [2021-07-13 20:11:40,115 INFO L226 Difference]: Without dead ends: 99734 [2021-07-13 20:11:40,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 9781.8ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-07-13 20:11:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99734 states. [2021-07-13 20:11:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99734 to 17519. [2021-07-13 20:11:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 3.3529512501427106) internal successors, (58737), 17518 states have internal predecessors, (58737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 58737 transitions. [2021-07-13 20:11:41,208 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 58737 transitions. Word has length 54 [2021-07-13 20:11:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:41,208 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 58737 transitions. [2021-07-13 20:11:41,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 58737 transitions. [2021-07-13 20:11:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:41,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:41,237 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:41,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:11:41,448 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:41,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 676623085, now seen corresponding path program 46 times [2021-07-13 20:11:41,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:41,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774952329] [2021-07-13 20:11:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:11:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774952329] [2021-07-13 20:11:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774952329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019933897] [2021-07-13 20:11:41,835 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:41,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:11:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:42,622 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:11:42,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:42,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:42,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:42,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:11:42,766 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:11:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:11:42,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:42,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:42,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:42,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:11:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:42,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019933897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:42,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:42,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:11:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057957908] [2021-07-13 20:11:42,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:42,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:42,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:42,852 INFO L87 Difference]: Start difference. First operand 17519 states and 58737 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:57,360 INFO L93 Difference]: Finished difference Result 106844 states and 359808 transitions. [2021-07-13 20:11:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-07-13 20:11:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:11:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:57,937 INFO L225 Difference]: With dead ends: 106844 [2021-07-13 20:11:57,937 INFO L226 Difference]: Without dead ends: 105974 [2021-07-13 20:11:57,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 11930.7ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-07-13 20:11:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105974 states. [2021-07-13 20:11:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105974 to 16906. [2021-07-13 20:11:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16906 states, 16905 states have (on average 3.3510795622596863) internal successors, (56650), 16905 states have internal predecessors, (56650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 56650 transitions. [2021-07-13 20:11:59,160 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 56650 transitions. Word has length 54 [2021-07-13 20:11:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:59,160 INFO L482 AbstractCegarLoop]: Abstraction has 16906 states and 56650 transitions. [2021-07-13 20:11:59,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 56650 transitions. [2021-07-13 20:11:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:11:59,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:59,188 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:59,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-07-13 20:11:59,389 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:59,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1343056893, now seen corresponding path program 47 times [2021-07-13 20:11:59,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:59,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293576250] [2021-07-13 20:11:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:11:59,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293576250] [2021-07-13 20:11:59,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293576250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084246868] [2021-07-13 20:11:59,938 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:59,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:11:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:11:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:00,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:00,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:12:00,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:37 [2021-07-13 20:12:00,911 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:00,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:12:00,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:12:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:01,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084246868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:01,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:01,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:12:01,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312762657] [2021-07-13 20:12:01,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:01,010 INFO L87 Difference]: Start difference. First operand 16906 states and 56650 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:13,152 INFO L93 Difference]: Finished difference Result 86669 states and 292345 transitions. [2021-07-13 20:12:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-07-13 20:12:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:13,440 INFO L225 Difference]: With dead ends: 86669 [2021-07-13 20:12:13,441 INFO L226 Difference]: Without dead ends: 85459 [2021-07-13 20:12:13,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 9666.6ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-07-13 20:12:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85459 states. [2021-07-13 20:12:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85459 to 16784. [2021-07-13 20:12:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 16783 states have (on average 3.352320800810344) internal successors, (56262), 16783 states have internal predecessors, (56262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 56262 transitions. [2021-07-13 20:12:14,333 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 56262 transitions. Word has length 54 [2021-07-13 20:12:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:14,333 INFO L482 AbstractCegarLoop]: Abstraction has 16784 states and 56262 transitions. [2021-07-13 20:12:14,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 56262 transitions. [2021-07-13 20:12:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:14,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:14,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:14,577 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 770927037, now seen corresponding path program 48 times [2021-07-13 20:12:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:14,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886285454] [2021-07-13 20:12:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:12:15,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886285454] [2021-07-13 20:12:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886285454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913873903] [2021-07-13 20:12:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:15,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:12:15,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:15,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:12:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:16,105 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:16,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:12:16,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:16,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:12:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:16,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:12:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:12:16,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-13 20:12:16,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:16,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-13 20:12:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913873903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:16,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:16,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:12:16,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136748744] [2021-07-13 20:12:16,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:12:16,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:12:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:12:16,450 INFO L87 Difference]: Start difference. First operand 16784 states and 56262 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:29,225 INFO L93 Difference]: Finished difference Result 91509 states and 308567 transitions. [2021-07-13 20:12:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-07-13 20:12:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:29,523 INFO L225 Difference]: With dead ends: 91509 [2021-07-13 20:12:29,523 INFO L226 Difference]: Without dead ends: 90649 [2021-07-13 20:12:29,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23550 ImplicationChecksByTransitivity, 9938.8ms TimeCoverageRelationStatistics Valid=5558, Invalid=55204, Unknown=0, NotChecked=0, Total=60762 [2021-07-13 20:12:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90649 states. [2021-07-13 20:12:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90649 to 17604. [2021-07-13 20:12:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17604 states, 17603 states have (on average 3.3469295006532978) internal successors, (58916), 17603 states have internal predecessors, (58916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17604 states to 17604 states and 58916 transitions. [2021-07-13 20:12:30,674 INFO L78 Accepts]: Start accepts. Automaton has 17604 states and 58916 transitions. Word has length 54 [2021-07-13 20:12:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:30,674 INFO L482 AbstractCegarLoop]: Abstraction has 17604 states and 58916 transitions. [2021-07-13 20:12:30,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 17604 states and 58916 transitions. [2021-07-13 20:12:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:30,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:30,703 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:30,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 20:12:30,904 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -347938093, now seen corresponding path program 49 times [2021-07-13 20:12:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:30,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304558478] [2021-07-13 20:12:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:12:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304558478] [2021-07-13 20:12:31,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304558478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943492636] [2021-07-13 20:12:31,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:12:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:31,987 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:12:31,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:32,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:12:32,143 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:32,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:12:32,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:32,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:12:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943492636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:32,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:12:32,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862389057] [2021-07-13 20:12:32,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:12:32,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:12:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:12:32,230 INFO L87 Difference]: Start difference. First operand 17604 states and 58916 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:44,064 INFO L93 Difference]: Finished difference Result 77944 states and 263222 transitions. [2021-07-13 20:12:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-07-13 20:12:44,064 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:44,451 INFO L225 Difference]: With dead ends: 77944 [2021-07-13 20:12:44,452 INFO L226 Difference]: Without dead ends: 77094 [2021-07-13 20:12:44,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18674 ImplicationChecksByTransitivity, 9147.3ms TimeCoverageRelationStatistics Valid=5058, Invalid=44004, Unknown=0, NotChecked=0, Total=49062 [2021-07-13 20:12:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77094 states. [2021-07-13 20:12:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77094 to 18339. [2021-07-13 20:12:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 3.3434943832479007) internal successors, (61313), 18338 states have internal predecessors, (61313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 61313 transitions. [2021-07-13 20:12:45,260 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 61313 transitions. Word has length 54 [2021-07-13 20:12:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 18339 states and 61313 transitions. [2021-07-13 20:12:45,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 61313 transitions. [2021-07-13 20:12:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:12:45,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:45,292 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:45,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:45,495 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1720996819, now seen corresponding path program 50 times [2021-07-13 20:12:45,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:45,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063277039] [2021-07-13 20:12:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:45,893 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 17 [2021-07-13 20:12:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:12:46,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063277039] [2021-07-13 20:12:46,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063277039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942528414] [2021-07-13 20:12:46,240 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:46,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:46,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:12:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:46,989 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:12:46,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:46,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:12:47,175 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:12:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:12:47,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:47,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:47,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:47,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:12:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:47,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942528414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:47,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:47,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:12:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136189638] [2021-07-13 20:12:47,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:12:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:12:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:12:47,262 INFO L87 Difference]: Start difference. First operand 18339 states and 61313 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:59,064 INFO L93 Difference]: Finished difference Result 91695 states and 308842 transitions. [2021-07-13 20:12:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-07-13 20:12:59,064 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:12:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:59,355 INFO L225 Difference]: With dead ends: 91695 [2021-07-13 20:12:59,355 INFO L226 Difference]: Without dead ends: 90875 [2021-07-13 20:12:59,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20016 ImplicationChecksByTransitivity, 8581.9ms TimeCoverageRelationStatistics Valid=4724, Invalid=48406, Unknown=0, NotChecked=0, Total=53130 [2021-07-13 20:12:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-07-13 20:13:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 18867. [2021-07-13 20:13:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18867 states, 18866 states have (on average 3.336319304569066) internal successors, (62943), 18866 states have internal predecessors, (62943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18867 states to 18867 states and 62943 transitions. [2021-07-13 20:13:00,685 INFO L78 Accepts]: Start accepts. Automaton has 18867 states and 62943 transitions. Word has length 54 [2021-07-13 20:13:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:00,685 INFO L482 AbstractCegarLoop]: Abstraction has 18867 states and 62943 transitions. [2021-07-13 20:13:00,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18867 states and 62943 transitions. [2021-07-13 20:13:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:00,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:00,723 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:00,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:00,937 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1213673013, now seen corresponding path program 51 times [2021-07-13 20:13:00,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:00,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176908496] [2021-07-13 20:13:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:01,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:01,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176908496] [2021-07-13 20:13:01,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176908496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:01,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456794] [2021-07-13 20:13:01,903 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:01,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:13:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:02,837 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:02,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:13:02,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:02,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:02,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:02,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:13:03,114 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:03,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:03,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:03,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:13:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:03,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:03,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:03,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:13:03,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769311395] [2021-07-13 20:13:03,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:13:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:13:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:13:03,240 INFO L87 Difference]: Start difference. First operand 18867 states and 62943 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:19,534 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-07-13 20:13:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,666 INFO L93 Difference]: Finished difference Result 116913 states and 393329 transitions. [2021-07-13 20:13:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-07-13 20:13:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:21,067 INFO L225 Difference]: With dead ends: 116913 [2021-07-13 20:13:21,067 INFO L226 Difference]: Without dead ends: 116083 [2021-07-13 20:13:21,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 13630.1ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-07-13 20:13:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116083 states. [2021-07-13 20:13:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116083 to 20115. [2021-07-13 20:13:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 3.33016804215969) internal successors, (66983), 20114 states have internal predecessors, (66983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 66983 transitions. [2021-07-13 20:13:22,989 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 66983 transitions. Word has length 54 [2021-07-13 20:13:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:22,989 INFO L482 AbstractCegarLoop]: Abstraction has 20115 states and 66983 transitions. [2021-07-13 20:13:22,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 66983 transitions. [2021-07-13 20:13:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:23,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:23,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:23,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 20:13:23,223 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash 295594003, now seen corresponding path program 52 times [2021-07-13 20:13:23,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:23,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356807088] [2021-07-13 20:13:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:23,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356807088] [2021-07-13 20:13:23,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356807088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:23,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533439394] [2021-07-13 20:13:23,757 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:23,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:13:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:24,356 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:24,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:13:24,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:24,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:13:24,588 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:24,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:24,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:24,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:13:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533439394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:24,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:24,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:13:24,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905249549] [2021-07-13 20:13:24,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:13:24,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:13:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:13:24,675 INFO L87 Difference]: Start difference. First operand 20115 states and 66983 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:40,410 INFO L93 Difference]: Finished difference Result 124269 states and 417429 transitions. [2021-07-13 20:13:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-13 20:13:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:40,854 INFO L225 Difference]: With dead ends: 124269 [2021-07-13 20:13:40,854 INFO L226 Difference]: Without dead ends: 122609 [2021-07-13 20:13:40,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 12185.1ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-07-13 20:13:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122609 states. [2021-07-13 20:13:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122609 to 21964. [2021-07-13 20:13:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21964 states, 21963 states have (on average 3.322087146564677) internal successors, (72963), 21963 states have internal predecessors, (72963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21964 states to 21964 states and 72963 transitions. [2021-07-13 20:13:42,626 INFO L78 Accepts]: Start accepts. Automaton has 21964 states and 72963 transitions. Word has length 54 [2021-07-13 20:13:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:42,626 INFO L482 AbstractCegarLoop]: Abstraction has 21964 states and 72963 transitions. [2021-07-13 20:13:42,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:42,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21964 states and 72963 transitions. [2021-07-13 20:13:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:42,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:42,661 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:42,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:13:42,862 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 350486487, now seen corresponding path program 53 times [2021-07-13 20:13:42,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:42,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278510741] [2021-07-13 20:13:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:43,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278510741] [2021-07-13 20:13:43,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278510741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030416348] [2021-07-13 20:13:43,324 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:43,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:13:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:44,239 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:44,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:13:44,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:44,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-13 20:13:44,348 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:44,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:44,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:44,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:13:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030416348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:44,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:44,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:13:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250290901] [2021-07-13 20:13:44,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:13:44,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:13:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:13:44,478 INFO L87 Difference]: Start difference. First operand 21964 states and 72963 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:52,585 INFO L93 Difference]: Finished difference Result 69919 states and 235479 transitions. [2021-07-13 20:13:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-13 20:13:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:13:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:52,799 INFO L225 Difference]: With dead ends: 69919 [2021-07-13 20:13:52,800 INFO L226 Difference]: Without dead ends: 68859 [2021-07-13 20:13:52,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11074 ImplicationChecksByTransitivity, 6336.9ms TimeCoverageRelationStatistics Valid=3234, Invalid=27918, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 20:13:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68859 states. [2021-07-13 20:13:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68859 to 22062. [2021-07-13 20:13:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 3.3209736639318255) internal successors, (73264), 22061 states have internal predecessors, (73264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 73264 transitions. [2021-07-13 20:13:53,834 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 73264 transitions. Word has length 54 [2021-07-13 20:13:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:53,834 INFO L482 AbstractCegarLoop]: Abstraction has 22062 states and 73264 transitions. [2021-07-13 20:13:53,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 73264 transitions. [2021-07-13 20:13:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:13:53,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:53,869 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:54,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:54,070 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1417516959, now seen corresponding path program 54 times [2021-07-13 20:13:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:54,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931257542] [2021-07-13 20:13:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 20:13:54,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931257542] [2021-07-13 20:13:54,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931257542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890133651] [2021-07-13 20:13:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:54,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:13:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:13:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:55,187 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:13:55,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:55,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:55,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:55,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:13:55,322 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:55,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:55,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:55,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:55,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:13:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890133651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:55,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:55,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:13:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091809288] [2021-07-13 20:13:55,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:55,415 INFO L87 Difference]: Start difference. First operand 22062 states and 73264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:09,048 INFO L93 Difference]: Finished difference Result 150720 states and 516372 transitions. [2021-07-13 20:14:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-13 20:14:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:09,946 INFO L225 Difference]: With dead ends: 150720 [2021-07-13 20:14:09,946 INFO L226 Difference]: Without dead ends: 145955 [2021-07-13 20:14:09,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 10751.7ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-07-13 20:14:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2021-07-13 20:14:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 25238. [2021-07-13 20:14:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25238 states, 25237 states have (on average 3.303245235170583) internal successors, (83364), 25237 states have internal predecessors, (83364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25238 states to 25238 states and 83364 transitions. [2021-07-13 20:14:12,011 INFO L78 Accepts]: Start accepts. Automaton has 25238 states and 83364 transitions. Word has length 54 [2021-07-13 20:14:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:12,011 INFO L482 AbstractCegarLoop]: Abstraction has 25238 states and 83364 transitions. [2021-07-13 20:14:12,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25238 states and 83364 transitions. [2021-07-13 20:14:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:12,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:12,057 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 20:14:12,259 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 668210515, now seen corresponding path program 55 times [2021-07-13 20:14:12,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:12,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630896397] [2021-07-13 20:14:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:14:12,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630896397] [2021-07-13 20:14:12,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630896397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676951525] [2021-07-13 20:14:12,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:14:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:13,341 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:14:13,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:13,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:14:13,561 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:13,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:13,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:13,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:14:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676951525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:13,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:13,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:14:13,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464693374] [2021-07-13 20:14:13,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:14:13,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:14:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:14:13,642 INFO L87 Difference]: Start difference. First operand 25238 states and 83364 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:25,571 INFO L93 Difference]: Finished difference Result 105434 states and 354160 transitions. [2021-07-13 20:14:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-13 20:14:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:26,148 INFO L225 Difference]: With dead ends: 105434 [2021-07-13 20:14:26,148 INFO L226 Difference]: Without dead ends: 104584 [2021-07-13 20:14:26,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23552 ImplicationChecksByTransitivity, 9256.3ms TimeCoverageRelationStatistics Valid=5754, Invalid=53538, Unknown=0, NotChecked=0, Total=59292 [2021-07-13 20:14:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104584 states. [2021-07-13 20:14:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104584 to 26860. [2021-07-13 20:14:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26860 states, 26859 states have (on average 3.29863360512305) internal successors, (88598), 26859 states have internal predecessors, (88598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26860 states to 26860 states and 88598 transitions. [2021-07-13 20:14:27,576 INFO L78 Accepts]: Start accepts. Automaton has 26860 states and 88598 transitions. Word has length 54 [2021-07-13 20:14:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:27,576 INFO L482 AbstractCegarLoop]: Abstraction has 26860 states and 88598 transitions. [2021-07-13 20:14:27,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 26860 states and 88598 transitions. [2021-07-13 20:14:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:27,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:27,628 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:27,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:14:27,835 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash 160886709, now seen corresponding path program 56 times [2021-07-13 20:14:27,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:27,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543383003] [2021-07-13 20:14:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:14:28,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:28,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543383003] [2021-07-13 20:14:28,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543383003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:28,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291840295] [2021-07-13 20:14:28,366 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:28,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:28,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:14:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:29,065 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:14:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:29,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:29,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:29,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:14:29,249 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:29,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:29,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:29,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:29,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:29,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:14:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:29,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291840295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:29,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:29,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:14:29,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012919019] [2021-07-13 20:14:29,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:14:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:14:29,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:14:29,331 INFO L87 Difference]: Start difference. First operand 26860 states and 88598 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:44,133 INFO L93 Difference]: Finished difference Result 130379 states and 438439 transitions. [2021-07-13 20:14:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-07-13 20:14:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:14:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:44,609 INFO L225 Difference]: With dead ends: 130379 [2021-07-13 20:14:44,609 INFO L226 Difference]: Without dead ends: 129369 [2021-07-13 20:14:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 12069.8ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-07-13 20:14:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129369 states. [2021-07-13 20:14:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129369 to 27396. [2021-07-13 20:14:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27396 states, 27395 states have (on average 3.301770396057675) internal successors, (90452), 27395 states have internal predecessors, (90452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27396 states to 27396 states and 90452 transitions. [2021-07-13 20:14:46,545 INFO L78 Accepts]: Start accepts. Automaton has 27396 states and 90452 transitions. Word has length 54 [2021-07-13 20:14:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:46,545 INFO L482 AbstractCegarLoop]: Abstraction has 27396 states and 90452 transitions. [2021-07-13 20:14:46,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 27396 states and 90452 transitions. [2021-07-13 20:14:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:14:46,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:46,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:46,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:46,993 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -757192301, now seen corresponding path program 57 times [2021-07-13 20:14:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529466710] [2021-07-13 20:14:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:14:47,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:47,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529466710] [2021-07-13 20:14:47,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529466710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:47,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844222743] [2021-07-13 20:14:47,443 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:47,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:14:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:48,313 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:14:48,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:48,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:14:48,492 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:14:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:48,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:48,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:14:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:48,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844222743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:48,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:48,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:14:48,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958533874] [2021-07-13 20:14:48,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:14:48,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:48,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:14:48,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:14:48,655 INFO L87 Difference]: Start difference. First operand 27396 states and 90452 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:06,463 INFO L93 Difference]: Finished difference Result 144390 states and 485662 transitions. [2021-07-13 20:15:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-07-13 20:15:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:07,004 INFO L225 Difference]: With dead ends: 144390 [2021-07-13 20:15:07,004 INFO L226 Difference]: Without dead ends: 142820 [2021-07-13 20:15:07,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 14816.4ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-07-13 20:15:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142820 states. [2021-07-13 20:15:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142820 to 27718. [2021-07-13 20:15:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27718 states, 27717 states have (on average 3.300285023631706) internal successors, (91474), 27717 states have internal predecessors, (91474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27718 states to 27718 states and 91474 transitions. [2021-07-13 20:15:09,543 INFO L78 Accepts]: Start accepts. Automaton has 27718 states and 91474 transitions. Word has length 54 [2021-07-13 20:15:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:09,543 INFO L482 AbstractCegarLoop]: Abstraction has 27718 states and 91474 transitions. [2021-07-13 20:15:09,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27718 states and 91474 transitions. [2021-07-13 20:15:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:09,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:09,593 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:09,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:09,795 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -450654615, now seen corresponding path program 58 times [2021-07-13 20:15:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:09,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157401567] [2021-07-13 20:15:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:15:10,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:10,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157401567] [2021-07-13 20:15:10,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157401567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:10,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293115109] [2021-07-13 20:15:10,403 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:10,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:15:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,170 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:15:11,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:15:11,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:15:11,311 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:15:11,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:11,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:15:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293115109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:15:11,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656870774] [2021-07-13 20:15:11,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:15:11,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:15:11,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:15:11,393 INFO L87 Difference]: Start difference. First operand 27718 states and 91474 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:25,536 INFO L93 Difference]: Finished difference Result 126027 states and 422969 transitions. [2021-07-13 20:15:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-13 20:15:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:26,253 INFO L225 Difference]: With dead ends: 126027 [2021-07-13 20:15:26,253 INFO L226 Difference]: Without dead ends: 125012 [2021-07-13 20:15:26,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 10911.9ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-07-13 20:15:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125012 states. [2021-07-13 20:15:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125012 to 27184. [2021-07-13 20:15:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27184 states, 27183 states have (on average 3.2973181768016775) internal successors, (89631), 27183 states have internal predecessors, (89631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27184 states to 27184 states and 89631 transitions. [2021-07-13 20:15:28,221 INFO L78 Accepts]: Start accepts. Automaton has 27184 states and 89631 transitions. Word has length 54 [2021-07-13 20:15:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:28,221 INFO L482 AbstractCegarLoop]: Abstraction has 27184 states and 89631 transitions. [2021-07-13 20:15:28,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 27184 states and 89631 transitions. [2021-07-13 20:15:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:28,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:28,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:28,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:15:28,471 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1368733625, now seen corresponding path program 59 times [2021-07-13 20:15:28,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:28,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327513885] [2021-07-13 20:15:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:15:28,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327513885] [2021-07-13 20:15:28,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327513885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639288256] [2021-07-13 20:15:28,874 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:28,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:15:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:15:28,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:15:29,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:29,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-07-13 20:15:29,853 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:15:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:29,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:29,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:15:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:29,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639288256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:29,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:29,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:15:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923519171] [2021-07-13 20:15:29,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:15:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:15:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:15:29,938 INFO L87 Difference]: Start difference. First operand 27184 states and 89631 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:47,222 INFO L93 Difference]: Finished difference Result 132631 states and 444905 transitions. [2021-07-13 20:15:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-07-13 20:15:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:15:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:48,024 INFO L225 Difference]: With dead ends: 132631 [2021-07-13 20:15:48,024 INFO L226 Difference]: Without dead ends: 131761 [2021-07-13 20:15:48,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39131 ImplicationChecksByTransitivity, 14215.7ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-07-13 20:15:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131761 states. [2021-07-13 20:15:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131761 to 26238. [2021-07-13 20:15:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26238 states, 26237 states have (on average 3.297976140564851) internal successors, (86529), 26237 states have internal predecessors, (86529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26238 states to 26238 states and 86529 transitions. [2021-07-13 20:15:49,915 INFO L78 Accepts]: Start accepts. Automaton has 26238 states and 86529 transitions. Word has length 54 [2021-07-13 20:15:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:49,915 INFO L482 AbstractCegarLoop]: Abstraction has 26238 states and 86529 transitions. [2021-07-13 20:15:49,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 26238 states and 86529 transitions. [2021-07-13 20:15:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:15:49,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:49,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:50,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:50,166 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:50,167 INFO L82 PathProgramCache]: Analyzing trace with hash -702299817, now seen corresponding path program 60 times [2021-07-13 20:15:50,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:50,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593822212] [2021-07-13 20:15:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:15:50,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593822212] [2021-07-13 20:15:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593822212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671622921] [2021-07-13 20:15:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:50,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:15:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:15:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:51,544 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:15:51,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:15:51,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:51,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-13 20:15:51,675 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:15:51,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:51,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:51,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:51,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:15:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671622921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:51,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-13 20:15:51,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707876885] [2021-07-13 20:15:51,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:15:51,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:15:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:15:51,768 INFO L87 Difference]: Start difference. First operand 26238 states and 86529 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:05,655 INFO L93 Difference]: Finished difference Result 108205 states and 362412 transitions. [2021-07-13 20:16:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-07-13 20:16:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:06,055 INFO L225 Difference]: With dead ends: 108205 [2021-07-13 20:16:06,055 INFO L226 Difference]: Without dead ends: 106791 [2021-07-13 20:16:06,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26754 ImplicationChecksByTransitivity, 11011.6ms TimeCoverageRelationStatistics Valid=6587, Invalid=60235, Unknown=0, NotChecked=0, Total=66822 [2021-07-13 20:16:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106791 states. [2021-07-13 20:16:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106791 to 23572. [2021-07-13 20:16:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23572 states, 23571 states have (on average 3.3202240040728013) internal successors, (78261), 23571 states have internal predecessors, (78261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 78261 transitions. [2021-07-13 20:16:07,683 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 78261 transitions. Word has length 54 [2021-07-13 20:16:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:07,684 INFO L482 AbstractCegarLoop]: Abstraction has 23572 states and 78261 transitions. [2021-07-13 20:16:07,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 78261 transitions. [2021-07-13 20:16:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:07,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:07,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:07,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:07,925 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1274429673, now seen corresponding path program 61 times [2021-07-13 20:16:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:07,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161214133] [2021-07-13 20:16:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:08,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:08,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161214133] [2021-07-13 20:16:08,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161214133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:08,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685391807] [2021-07-13 20:16:08,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:16:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:09,206 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:09,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:16:09,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:09,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:16:09,385 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:09,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:09,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:09,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:09,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:16:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:09,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685391807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:09,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:09,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:16:09,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207839117] [2021-07-13 20:16:09,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:16:09,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:09,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:16:09,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:16:09,470 INFO L87 Difference]: Start difference. First operand 23572 states and 78261 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:21,834 INFO L93 Difference]: Finished difference Result 101893 states and 342921 transitions. [2021-07-13 20:16:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-13 20:16:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:22,464 INFO L225 Difference]: With dead ends: 101893 [2021-07-13 20:16:22,464 INFO L226 Difference]: Without dead ends: 101033 [2021-07-13 20:16:22,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23364 ImplicationChecksByTransitivity, 9865.1ms TimeCoverageRelationStatistics Valid=5536, Invalid=54734, Unknown=0, NotChecked=0, Total=60270 [2021-07-13 20:16:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101033 states. [2021-07-13 20:16:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101033 to 23904. [2021-07-13 20:16:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 3.316487470192026) internal successors, (79274), 23903 states have internal predecessors, (79274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 79274 transitions. [2021-07-13 20:16:23,886 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 79274 transitions. Word has length 54 [2021-07-13 20:16:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:23,886 INFO L482 AbstractCegarLoop]: Abstraction has 23904 states and 79274 transitions. [2021-07-13 20:16:23,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 79274 transitions. [2021-07-13 20:16:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:23,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:23,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:24,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:24,128 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1901672493, now seen corresponding path program 62 times [2021-07-13 20:16:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:24,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482390189] [2021-07-13 20:16:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:24,576 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:16:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:16:24,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482390189] [2021-07-13 20:16:24,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482390189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032616595] [2021-07-13 20:16:24,669 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:24,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:24,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:24,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:16:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:25,330 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:16:25,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:25,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:16:25,535 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:25,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:25,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:25,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:16:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032616595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:25,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:25,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-13 20:16:25,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739111194] [2021-07-13 20:16:25,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:16:25,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:25,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:16:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:16:25,619 INFO L87 Difference]: Start difference. First operand 23904 states and 79274 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:38,553 INFO L93 Difference]: Finished difference Result 91780 states and 309030 transitions. [2021-07-13 20:16:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-13 20:16:38,554 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:38,848 INFO L225 Difference]: With dead ends: 91780 [2021-07-13 20:16:38,848 INFO L226 Difference]: Without dead ends: 90930 [2021-07-13 20:16:38,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22028 ImplicationChecksByTransitivity, 10435.7ms TimeCoverageRelationStatistics Valid=5784, Invalid=51576, Unknown=0, NotChecked=0, Total=57360 [2021-07-13 20:16:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states. [2021-07-13 20:16:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90930 to 23990. [2021-07-13 20:16:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.311601150527325) internal successors, (79442), 23989 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 79442 transitions. [2021-07-13 20:16:40,213 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 79442 transitions. Word has length 54 [2021-07-13 20:16:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:40,213 INFO L482 AbstractCegarLoop]: Abstraction has 23990 states and 79442 transitions. [2021-07-13 20:16:40,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 79442 transitions. [2021-07-13 20:16:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:40,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:40,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:40,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 20:16:40,459 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:40,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1703119415, now seen corresponding path program 63 times [2021-07-13 20:16:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963210646] [2021-07-13 20:16:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:16:40,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:40,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963210646] [2021-07-13 20:16:40,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963210646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:40,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730139416] [2021-07-13 20:16:40,969 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:41,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:16:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:41,655 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:16:41,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:41,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-13 20:16:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:41,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:41,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:41,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:41,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-13 20:16:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:41,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730139416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:41,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-13 20:16:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201199343] [2021-07-13 20:16:41,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:16:41,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:16:41,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:16:41,954 INFO L87 Difference]: Start difference. First operand 23990 states and 79442 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:56,206 INFO L93 Difference]: Finished difference Result 83749 states and 282555 transitions. [2021-07-13 20:16:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-07-13 20:16:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:16:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:56,439 INFO L225 Difference]: With dead ends: 83749 [2021-07-13 20:16:56,439 INFO L226 Difference]: Without dead ends: 79687 [2021-07-13 20:16:56,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22824 ImplicationChecksByTransitivity, 11472.4ms TimeCoverageRelationStatistics Valid=5842, Invalid=52480, Unknown=0, NotChecked=0, Total=58322 [2021-07-13 20:16:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79687 states. [2021-07-13 20:16:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79687 to 24522. [2021-07-13 20:16:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24522 states, 24521 states have (on average 3.308837323110803) internal successors, (81136), 24521 states have internal predecessors, (81136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 81136 transitions. [2021-07-13 20:16:57,633 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 81136 transitions. Word has length 54 [2021-07-13 20:16:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:57,634 INFO L482 AbstractCegarLoop]: Abstraction has 24522 states and 81136 transitions. [2021-07-13 20:16:57,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 81136 transitions. [2021-07-13 20:16:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:16:57,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:57,684 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:57,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:57,899 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1112434429, now seen corresponding path program 64 times [2021-07-13 20:16:57,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:57,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824380969] [2021-07-13 20:16:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:16:58,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:58,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824380969] [2021-07-13 20:16:58,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824380969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:58,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527547329] [2021-07-13 20:16:58,330 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:58,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:16:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:59,053 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:59,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:16:59,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:59,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:59,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:59,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-13 20:16:59,224 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:16:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:59,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:59,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:59,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:59,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:16:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:59,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527547329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:59,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:59,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:16:59,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331235814] [2021-07-13 20:16:59,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:16:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:16:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:16:59,306 INFO L87 Difference]: Start difference. First operand 24522 states and 81136 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:11,696 INFO L93 Difference]: Finished difference Result 94684 states and 318256 transitions. [2021-07-13 20:17:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-13 20:17:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:11,991 INFO L225 Difference]: With dead ends: 94684 [2021-07-13 20:17:11,991 INFO L226 Difference]: Without dead ends: 93786 [2021-07-13 20:17:11,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22145 ImplicationChecksByTransitivity, 9617.3ms TimeCoverageRelationStatistics Valid=5306, Invalid=51576, Unknown=0, NotChecked=0, Total=56882 [2021-07-13 20:17:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93786 states. [2021-07-13 20:17:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93786 to 25118. [2021-07-13 20:17:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25118 states, 25117 states have (on average 3.3056495600589244) internal successors, (83028), 25117 states have internal predecessors, (83028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25118 states to 25118 states and 83028 transitions. [2021-07-13 20:17:13,443 INFO L78 Accepts]: Start accepts. Automaton has 25118 states and 83028 transitions. Word has length 54 [2021-07-13 20:17:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:13,443 INFO L482 AbstractCegarLoop]: Abstraction has 25118 states and 83028 transitions. [2021-07-13 20:17:13,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25118 states and 83028 transitions. [2021-07-13 20:17:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:13,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:13,488 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:13,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:13,691 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash 605110623, now seen corresponding path program 65 times [2021-07-13 20:17:13,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:13,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441530758] [2021-07-13 20:17:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:17:14,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:14,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441530758] [2021-07-13 20:17:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441530758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108495998] [2021-07-13 20:17:14,148 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:14,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:17:14,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:17:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:17:14,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:14,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:14,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:14,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:31 [2021-07-13 20:17:14,982 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:17:14,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:14,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:14,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:14,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:14,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:17:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:15,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108495998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:15,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:15,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:17:15,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112459280] [2021-07-13 20:17:15,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:17:15,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:15,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:17:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:17:15,066 INFO L87 Difference]: Start difference. First operand 25118 states and 83028 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:31,155 INFO L93 Difference]: Finished difference Result 115635 states and 388960 transitions. [2021-07-13 20:17:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-07-13 20:17:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:31,556 INFO L225 Difference]: With dead ends: 115635 [2021-07-13 20:17:31,556 INFO L226 Difference]: Without dead ends: 114631 [2021-07-13 20:17:31,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29308 ImplicationChecksByTransitivity, 12023.1ms TimeCoverageRelationStatistics Valid=7087, Invalid=66083, Unknown=0, NotChecked=0, Total=73170 [2021-07-13 20:17:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114631 states. [2021-07-13 20:17:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114631 to 25490. [2021-07-13 20:17:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 25489 states have (on average 3.3076621287614265) internal successors, (84309), 25489 states have internal predecessors, (84309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 84309 transitions. [2021-07-13 20:17:33,381 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 84309 transitions. Word has length 54 [2021-07-13 20:17:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:33,381 INFO L482 AbstractCegarLoop]: Abstraction has 25490 states and 84309 transitions. [2021-07-13 20:17:33,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 84309 transitions. [2021-07-13 20:17:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:33,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:33,428 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:33,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-07-13 20:17:33,632 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash -312968387, now seen corresponding path program 66 times [2021-07-13 20:17:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:33,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630616904] [2021-07-13 20:17:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:17:34,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:34,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630616904] [2021-07-13 20:17:34,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630616904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:34,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445179560] [2021-07-13 20:17:34,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:34,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:17:34,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:17:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:34,755 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:17:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-07-13 20:17:34,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:34,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:34,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:34,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-13 20:17:34,926 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:17:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:34,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:34,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:34,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:34,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:17:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:35,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445179560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:35,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:35,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:17:35,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792489941] [2021-07-13 20:17:35,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:17:35,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:17:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:17:35,008 INFO L87 Difference]: Start difference. First operand 25490 states and 84309 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:52,484 INFO L93 Difference]: Finished difference Result 126947 states and 426952 transitions. [2021-07-13 20:17:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-07-13 20:17:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:17:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:52,965 INFO L225 Difference]: With dead ends: 126947 [2021-07-13 20:17:52,965 INFO L226 Difference]: Without dead ends: 125608 [2021-07-13 20:17:52,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39699 ImplicationChecksByTransitivity, 14317.6ms TimeCoverageRelationStatistics Valid=8842, Invalid=86948, Unknown=0, NotChecked=0, Total=95790 [2021-07-13 20:17:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125608 states. [2021-07-13 20:17:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125608 to 25380. [2021-07-13 20:17:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 3.307064896174002) internal successors, (83930), 25379 states have internal predecessors, (83930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 83930 transitions. [2021-07-13 20:17:54,954 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 83930 transitions. Word has length 54 [2021-07-13 20:17:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:54,954 INFO L482 AbstractCegarLoop]: Abstraction has 25380 states and 83930 transitions. [2021-07-13 20:17:54,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 83930 transitions. [2021-07-13 20:17:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:17:54,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:54,993 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:55,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:55,194 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -6430701, now seen corresponding path program 67 times [2021-07-13 20:17:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:55,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639594301] [2021-07-13 20:17:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:17:55,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639594301] [2021-07-13 20:17:55,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639594301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520225935] [2021-07-13 20:17:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:17:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:56,454 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:17:56,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:17:56,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:56,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:56,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:56,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:17:56,593 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:17:56,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:56,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:56,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:56,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:56,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:17:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:56,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520225935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:56,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:56,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:17:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799284657] [2021-07-13 20:17:56,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:17:56,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:17:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:17:56,739 INFO L87 Difference]: Start difference. First operand 25380 states and 83930 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:11,327 INFO L93 Difference]: Finished difference Result 116033 states and 390273 transitions. [2021-07-13 20:18:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-07-13 20:18:11,328 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 20:18:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:11,781 INFO L225 Difference]: With dead ends: 116033 [2021-07-13 20:18:11,781 INFO L226 Difference]: Without dead ends: 115155 [2021-07-13 20:18:11,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27626 ImplicationChecksByTransitivity, 11361.3ms TimeCoverageRelationStatistics Valid=6490, Invalid=62942, Unknown=0, NotChecked=0, Total=69432 [2021-07-13 20:18:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115155 states. [2021-07-13 20:18:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115155 to 25374. [2021-07-13 20:18:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25374 states, 25373 states have (on average 3.307019272454972) internal successors, (83909), 25373 states have internal predecessors, (83909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25374 states to 25374 states and 83909 transitions. [2021-07-13 20:18:13,579 INFO L78 Accepts]: Start accepts. Automaton has 25374 states and 83909 transitions. Word has length 54 [2021-07-13 20:18:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:13,579 INFO L482 AbstractCegarLoop]: Abstraction has 25374 states and 83909 transitions. [2021-07-13 20:18:13,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 25374 states and 83909 transitions. [2021-07-13 20:18:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 20:18:13,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:13,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:13,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:13,823 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -924509711, now seen corresponding path program 68 times [2021-07-13 20:18:13,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:13,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897485784] [2021-07-13 20:18:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:18:14,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:14,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897485784] [2021-07-13 20:18:14,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897485784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:14,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013063957] [2021-07-13 20:18:14,379 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:14,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:18:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:15,025 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:18:15,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-13 20:18:15,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:15,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-13 20:18:15,166 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:18:15,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:18:15,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:15,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-13 20:18:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:15,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013063957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:15,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:15,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-13 20:18:15,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498305480] [2021-07-13 20:18:15,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:18:15,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:18:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:18:15,314 INFO L87 Difference]: Start difference. First operand 25374 states and 83909 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:18:18,803 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-07-13 20:18:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:18:19,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:19,004 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:18:19,006 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:18:19,007 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:18:19,007 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:18:19 BasicIcfg [2021-07-13 20:18:19,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:18:19,008 INFO L168 Benchmark]: Toolchain (without parser) took 720828.71 ms. Allocated memory was 181.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 161.0 MB in the beginning and 3.3 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.99 ms. Allocated memory is still 181.4 MB. Free memory was 160.9 MB in the beginning and 159.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L168 Benchmark]: Boogie Preprocessor took 18.87 ms. Allocated memory is still 181.4 MB. Free memory was 159.5 MB in the beginning and 158.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L168 Benchmark]: RCFGBuilder took 284.84 ms. Allocated memory is still 181.4 MB. Free memory was 158.4 MB in the beginning and 143.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L168 Benchmark]: TraceAbstraction took 720497.39 ms. Allocated memory was 181.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 142.5 MB in the beginning and 3.3 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:19,008 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.99 ms. Allocated memory is still 181.4 MB. Free memory was 160.9 MB in the beginning and 159.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.87 ms. Allocated memory is still 181.4 MB. Free memory was 159.5 MB in the beginning and 158.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.84 ms. Allocated memory is still 181.4 MB. Free memory was 158.4 MB in the beginning and 143.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 720497.39 ms. Allocated memory was 181.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 142.5 MB in the beginning and 3.3 GB in the end (delta: -3.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (25374states) and FLOYD_HOARE automaton (currently 64 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 30 for 15ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 720409.0ms, OverallIterations: 72, TraceHistogramMax: 3, EmptinessCheckTime: 1962.5ms, AutomataDifference: 568094.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 134.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7005 SDtfs, 82505 SDslu, 124511 SDs, 0 SdLazy, 259665 SolverSat, 24299 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 117179.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13999 GetRequests, 2237 SyntacticMatches, 135 SemanticMatches, 11626 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960773 ImplicationChecksByTransitivity, 433923.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27718occurred in iteration=61, InterpolantAutomatonStates: 9424, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56270.1ms AutomataMinimizationTime, 71 MinimizatonAttempts, 3253224 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 464.8ms SsaConstructionTime, 1918.8ms SatisfiabilityAnalysisTime, 75237.1ms InterpolantComputationTime, 6682 NumberOfCodeBlocks, 6682 NumberOfCodeBlocksAsserted, 266 NumberOfCheckSat, 6542 ConstructedInterpolants, 48 QuantifiedInterpolants, 98433 SizeOfPredicates, 708 NumberOfNonLiveVariables, 8988 ConjunctsInSsa, 2304 ConjunctsInUnsatCore, 140 InterpolantComputations, 6 PerfectInterpolantSequences, 927/3581 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 could not prove your program: Timeout Completed graceful shutdown